From 1109132f09d75da9a28b649c7677bb6ce07c40c0 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:41:45 -0500
Subject: initial commit

---
 files/es/mozilla/firefox/releases/30/index.html    |  92 +++++++
 files/es/mozilla/firefox/releases/50/index.html    | 203 ++++++++++++++
 files/es/mozilla/firefox/releases/57/index.html    | 299 +++++++++++++++++++++
 files/es/mozilla/firefox/releases/61/index.html    | 135 ++++++++++
 files/es/mozilla/firefox/releases/62/index.html    | 235 ++++++++++++++++
 files/es/mozilla/firefox/releases/63/index.html    | 274 +++++++++++++++++++
 files/es/mozilla/firefox/releases/66/index.html    | 162 +++++++++++
 files/es/mozilla/firefox/releases/67/index.html    | 198 ++++++++++++++
 files/es/mozilla/firefox/releases/68/index.html    | 233 ++++++++++++++++
 files/es/mozilla/firefox/releases/9/index.html     | 237 ++++++++++++++++
 .../firefox/releases/9/updating_add-ons/index.html |  69 +++++
 files/es/mozilla/firefox/releases/index.html       |  11 +
 12 files changed, 2148 insertions(+)
 create mode 100644 files/es/mozilla/firefox/releases/30/index.html
 create mode 100644 files/es/mozilla/firefox/releases/50/index.html
 create mode 100644 files/es/mozilla/firefox/releases/57/index.html
 create mode 100644 files/es/mozilla/firefox/releases/61/index.html
 create mode 100644 files/es/mozilla/firefox/releases/62/index.html
 create mode 100644 files/es/mozilla/firefox/releases/63/index.html
 create mode 100644 files/es/mozilla/firefox/releases/66/index.html
 create mode 100644 files/es/mozilla/firefox/releases/67/index.html
 create mode 100644 files/es/mozilla/firefox/releases/68/index.html
 create mode 100644 files/es/mozilla/firefox/releases/9/index.html
 create mode 100644 files/es/mozilla/firefox/releases/9/updating_add-ons/index.html
 create mode 100644 files/es/mozilla/firefox/releases/index.html

(limited to 'files/es/mozilla/firefox/releases')

diff --git a/files/es/mozilla/firefox/releases/30/index.html b/files/es/mozilla/firefox/releases/30/index.html
new file mode 100644
index 0000000000..01c5be6cda
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/30/index.html
@@ -0,0 +1,92 @@
+---
+title: Firefox 30 for developers
+slug: Mozilla/Firefox/Releases/30
+translation_of: Mozilla/Firefox/Releases/30
+---
+<div>{{FirefoxSidebar}}</div><p>Want to help document Firefox 30? See the <a class="external" href="http://beta.elchi3.de/doctracker/#list=fx&amp;version=30.0">list of bugs that need to be written about</a> and pitch in!</p>
+
+<h2 id="Cambios_para_los_Desarrolladores_Web">Cambios para los Desarrolladores Web</h2>
+
+<h3 id="Herramientas_para_Desarrolladores">Herramientas para Desarrolladores</h3>
+
+<ul>
+ <li>Ha sido implementado el Modelo de Caja Resaltado (Box Model Highlighter) ({{bug(663778)}}).</li>
+ <li>En cualquier parte el nodo DOM aparece en la salida de la consola, se resalta cuando se encima la salida de esa consola ({{bug(757866)}}). Sucede lo mismo con todas las funciones y objetos JS, son resaltados en la salida de la consola ({{bug(584733)}}). Más información acerca de las mejoras de la consola pueden econtrarse en el siguiente <a href="http://www.robodesign.ro/mihai/blog/web-console-improvements-episode-30">post del blog</a>.</li>
+ <li>Sopoerte para {{domxref("Console.count()")}} ha sido agregado ({{bug(922208)}}).</li>
+</ul>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li>La propiedad {{cssxref("background-blend-mode")}} ha sido habilitada por defecto ({{bug(970600)}}).</li>
+ <li>La propiedad no estándar  {{cssxref("overflow-clip-box")}} ha sido implementada para utilizarse solamente en las hojas de estilo UA ({{bug(966992)}}).</li>
+ <li>La propiedad {{cssxref("line-height")}} afecta ahora a las entradas de lineas de texto sencillas  (<code>&lt;input type=text|password|email|search|tel|url|unknown&gt;</code> types) aunque no puede reducir su tamaño por debajo de una altura de la línea de <code>1.0</code> ({{bug(349259)}}).</li>
+ <li>La propiedad {{cssxref("line-height")}} ahora también afecta el <code>type=button</code>, sin restricciones ({{bug(697451)}}).</li>
+ <li>El cambio al nombre de los keyframes no afecta los elementos actuales ({{bug(978648)}}).</li>
+</ul>
+
+<h3 id="HTML">HTML</h3>
+
+<p><em>Sin cambios.</em></p>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<ul>
+ <li>New ES6-compatible <a href="/en-US/docs/Web/JavaScript/Reference/Operators/Array_comprehensions">array comprehensions</a> <code>[for (item of iterable) item]</code> and <a href="/en-US/docs/Web/JavaScript/Reference/Operators/Generator_comprehensions">generator comprehensions</a> <code>(for (item of iterable) item)</code> have been implemented ({{bug(979865)}}).</li>
+ <li><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray#Property_access">Typed arrays</a> are now extensible and support new named properties ({{bug(695438)}}).</li>
+ <li>The {{jsxref("Error.prototype.stack")}} property now contains column numbers ({{bug(762556)}}) and has been improved <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/Stack#Stack_of_eval'ed_code">when using <code>Function()</code> and <code>eval()</code> calls</a>. This can help you to better debug minified or generated JavaScript code.</li>
+ <li>The <code>Promise.cast()</code> method has been renamed to {{jsxref("Promise.resolve()")}} ({{bug(966348)}}).</li>
+</ul>
+
+<h3 id="InterfacesAPIsDOM">Interfaces/APIs/DOM</h3>
+
+<ul>
+ <li>{{domxref("Navigator.sendBeacon")}} has been implemented, easing telemetry collection ({{bug(936340)}}).</li>
+ <li>Added a <code>relList</code> property returning a {{domxref("DOMTokenList")}} to {{domxref("HTMLLinkElement")}}, {{domxref("HTMLAreaElement")}} and {{domxref("HTMLAnchorElement")}} ({{bug(968637)}}).</li>
+ <li>As per the latest specification, the first argument of {{domxref("OscillatorNode.start")}} and {{domxref("OscillatorNode.stop")}} is now optional and defaults to <code>0</code> ({{bug(982541)}}).</li>
+ <li>The method {{domxref("Navigator.requestWakeLock()")}} and the non-standard {{domxref("MozWakeLock")}} are no longer available from the Web on Desktop ({{bug(963366)}}).</li>
+ <li>The <code>DOM_VK_ENTER</code> constant has been removed from {{domxref("KeyboardEvent")}} ({{bug(969247)}}).</li>
+ <li>Web components' {{domxref("Document.register")}} has been adapted to follow the behavior described in the latest version of the specification ({{bug(856140)}}).</li>
+ <li>Basic support for Hit regions on canvas has been added: the methods {{domxref("CanvasRenderingContext2D.addHitRegion()")}} and {{domxref("CanvasRenderingContext2D.removeHitRegion()")}} have been added. These are disabled by default; to activate them set the preference <code>canvas.hitregions.enabled</code> to <code>true</code>. ({{bug(966591)}})</li>
+ <li>The non-standard, and deprecated since Firefox 15, {{domxref("Blob.mozSlice")}} is no longer supported ({{bug(961804)}}).</li>
+ <li>The non-standard {{domxref("ArchiveReader")}} and {{domxref("ArchiveRequest")}} are no longer exposed to the Web ({{bug(968883)}}).</li>
+ <li><a href="http://dxr.mozilla.org/mozilla-central/source/dom/webidl/">WebIDL constructors</a> cannot be called as functions anymore. They need to be preceded by the keyword <code>new</code>. ({{bug(916644)}})</li>
+ <li>Added support for a new value (<code>alpha</code>) for the second, optional, parameter of the {{domxref("Canvas.getContext()")}} method allowing to define if alpha blending must be stored or not for this context. When not, the per-pixel alpha value in this store is always <code>1.0</code>. This allows the back-end to implement a fast-track. ({{bug(982480)}})</li>
+ <li>{{domxref("GlobalWorkerScope.consle")}} now returns for the regular {{domxref("Console")}}; {{domxref("WorkerConsole")}} has been removed ({{bug(965860)}}).</li>
+</ul>
+
+<h3 id="MathML">MathML</h3>
+
+<p><em>No change.</em></p>
+
+<h3 id="SVG">SVG</h3>
+
+<ul>
+ <li>{{SVGElement("feDropShadow")}}, and its interface {{domxref("SVGFEDropShadowElement")}}, from the Filter Effects Module are now supported ({{bug(964200)}}).</li>
+</ul>
+
+<h3 id="AudioVideo">Audio/Video</h3>
+
+<ul>
+ <li>On Linux, Gstreamer 1.0 is now supported (instead of 0.10) ({{bug(806917)}}).</li>
+</ul>
+
+<h2 id="Security">Security</h2>
+
+<p><em>No change.</em></p>
+
+<h2 id="Changes_for_add-on_and_Mozilla_developers">Changes for add-on and Mozilla developers</h2>
+
+<ul>
+ <li>The interface <code>nsIDOMWindowUtils</code> now supports the Boolean attribute <code>audioMuted</code> and <code>audioVolume</code>, a float in the range <code>[0.0</code> ,  <code>1.0]</code>, allowing to control the sound produced by a window (that is any tab or iframe). There is no UI for this, but is available to add-ons. ({{bug(923247)}})</li>
+</ul>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Mozilla/Firefox/Releases/30/Site_Compatibility">Site Compatibility for Firefox 30</a></li>
+</ul>
+
+<h3 id="Older_versions">Older versions</h3>
+
+<p>{{Firefox_for_developers('29')}}</p>
diff --git a/files/es/mozilla/firefox/releases/50/index.html b/files/es/mozilla/firefox/releases/50/index.html
new file mode 100644
index 0000000000..bac952686e
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/50/index.html
@@ -0,0 +1,203 @@
+---
+title: Firefox 50 para desarrolladores
+slug: Mozilla/Firefox/Releases/50
+tags:
+  - Firefox
+  - Release Notes
+translation_of: Mozilla/Firefox/Releases/50
+---
+<div>{{FirefoxSidebar}}</div>
+
+<p>Firefox 50 was released on November 15, 2016. This article lists key changes that are useful not only for web developers, but also Firefox and Gecko developers as well as add-on developers.</p>
+
+<h2 id="Cambios_para_desarrolladores_Web">Cambios para desarrolladores Web</h2>
+
+<ul>
+</ul>
+
+<h3 id="HTML">HTML</h3>
+
+<ul>
+ <li>El estilo por defecto {{HTMLElement("bdo")}} ahora asigna {{cssxref("unicode-bidi")}} con el valor <code>isolate-override</code> ({{bug(1249497)}}).</li>
+ <li>Asignar el atributo {{htmlattrxref("src", "track")}} del elemento {{HTMLElement("track")}} ahora funciona correctamente ({{bug(1281418)}}).</li>
+ <li>El atributo <code>referrerpolicy</code> en los elementos {{HTMLElement("area")}}, {{HTMLElement("a")}}, {{HTMLElement("img")}}, {{HTMLElement("iframe")}} y {{HTMLElement("link")}} ahora está disponible por defecto ({{bug(1223838)}}, {{bug(1264165)}}).</li>
+</ul>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li>Esquinas con estilos punteados y rayados (<code>dashed, dotted</code>) Border-radiused ahora son mostradas con el estilo especificado en lugar de estilo sólido ({{bug(382721)}}).</li>
+ <li>El selector pseudo-clase no estándar {{cssxref(":-moz-full-screen-ancestor")}} fue removido ({{bug(1199529)}}).</li>
+ <li>{{cssxref("box-sizing")}}<code>: padding-box</code> fue removido, dado que ya no forma parte de la especificación y Firefox era el unico entre los principales navegadores que lo implementaba ({{bug(1166728)}}).</li>
+ <li>Se removió el prefijo de los tres valores <code>isolate</code>, <code>isolate-override</code>, y <code>plaintext</code> de la propiedad {{cssxref("unicode-bidi")}} ({{bug(1141895)}}).</li>
+ <li>En modo de compatibilidad, la etiqueta de un elemento de lista ahora hereda el tamaño de la lista, como en el modo estandar ({{bug(648331)}}).</li>
+ <li>Las pseudo-clases {{cssxref(":in-range")}} y {{cssxref(":out-of-range")}} cambiaron su comportamiento para no coincidir elementos input deshabilitados o de solo lectura ({{bug(1264157)}}).</li>
+ <li>Se removió el prefijo de la pseudo-clase {{cssxref(":any-link")}}({{bug(843579)}}).</li>
+ <li>El valor <code>space</code> para {{cssxref("border-image-repeat")}} fue implementado ({{bug(720531)}}).</li>
+</ul>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<ul>
+ <li>La propiedad del ES2015 {{jsxref("Symbol.hasInstance")}} ha sido implementada ({{bug(1054906)}}).</li>
+ <li>El método de ES2017 {{jsxref("Object.getOwnPropertyDescriptors()")}} ha sido implementado ({{bug(1245024)}}).</li>
+ <li>El comportamiento de \W in {{jsxref("RegExp")}} con los flags unicode e ignoreCase cambió para estar de acuerdo con el borrador mas reciente de la especificación. Ahora no coincide con K, S, k, s, and KELVIN SIGN (U+212A), y LATIN SMALL LETTER LONG S (U+017F) ({{bug(1281739)}}).</li>
+</ul>
+
+<h3 id="Herramientas_de_desarrollador">Herramientas de desarrollador</h3>
+
+<ul>
+ <li><a href="https://developer.mozilla.org/es/docs/Tools/Web_Console/Console_messages#Source_maps">La consola Web ahora entiende los source maps.</a></li>
+ <li><a href="https://developer.mozilla.org/es/docs/Tools/Storage_Inspector#IndexedDB">El inspector de almacenamiento ahora permite borrar elementos individuales desde los objetos de almacenamiento de IndexedDB.</a></li>
+ <li><a href="https://developer.mozilla.org/es/docs/Tools/Memory">La herramienta de memoria está habilitada por defecto.</a></li>
+ <li><a href="https://developer.mozilla.org/es/docs/Tools/Page_Inspector/UI_Tour#Computed_view">La panel de "Modelo de caja" fue movido al panel lateral Computado.</a></li>
+ <li><a href="https://developer.mozilla.org/es/docs/Tools/Web_Console/Console_messages#Viewing_network_request_details">La consola Web ahora muestra las trazas de pila para las peticiones de red XHR o Fetch().</a></li>
+ <li>
+  <p><a class="external external-icon" href="https://bugzilla.mozilla.org/buglist.cgi?list_id=13263766&amp;chfield=resolution&amp;chfieldfrom=2016-06-06&amp;chfieldvalue=FIXED&amp;resolution=FIXED&amp;classification=Client%20Software&amp;chfieldto=2016-08-01&amp;query_format=advanced&amp;bug_status=RESOLVED&amp;bug_status=VERIFIED&amp;component=Developer%20Tools&amp;component=Developer%20Tools%3A%20about%3Adebugging&amp;component=Developer%20Tools%3A%20Animation%20Inspector&amp;component=Developer%20Tools%3A%20Canvas%20Debugger&amp;component=Developer%20Tools%3A%20Computed%20Styles%20Inspector&amp;component=Developer%20Tools%3A%20Console&amp;component=Developer%20Tools%3A%20CSS%20Rules%20Inspector&amp;component=Developer%20Tools%3A%20Debugger&amp;component=Developer%20Tools%3A%20DOM&amp;component=Developer%20Tools%3A%20Font%20Inspector&amp;component=Developer%20Tools%3A%20Framework&amp;component=Developer%20Tools%3A%20Graphic%20Commandline%20and%20Toolbar&amp;component=Developer%20Tools%3A%20Inspector&amp;component=Developer%20Tools%3A%20JSON%20Viewer&amp;component=Developer%20Tools%3A%20Memory&amp;component=Developer%20Tools%3A%20Netmonitor&amp;component=Developer%20Tools%3A%20Object%20Inspector&amp;component=Developer%20Tools%3A%20Performance%20Tools%20%28Profiler%2FTimeline%29&amp;component=Developer%20Tools%3A%20Responsive%20Design%20Mode&amp;component=Developer%20Tools%3A%20Scratchpad&amp;component=Developer%20Tools%3A%20Shared%20Components&amp;component=Developer%20Tools%3A%20Source%20Editor&amp;component=Developer%20Tools%3A%20Storage%20Inspector&amp;component=Developer%20Tools%3A%20Style%20Editor&amp;component=Developer%20Tools%3A%20User%20Stories&amp;component=Developer%20Tools%3A%20Web%20Audio%20Editor&amp;component=Developer%20Tools%3A%20WebGL%20Shader%20Editor&amp;component=Developer%20Tools%3A%20WebIDE&amp;product=Firefox">Todos los bugs corregidos entre Firefox 49 y Firefox 50</a>.</p>
+ </li>
+</ul>
+
+<h3 id="HTTP">HTTP</h3>
+
+<ul>
+ <li>El protocolo experimental (y obsoleto) <a href="https://es.wikipedia.org/wiki/SPDY">SPDY</a> 3.1 ahora está deshabilitado por defecto {{bug(1287132)}}.</li>
+ <li>Se añadió soporte para {{HTTPHeader("X-Content-Type-Options")}}  ({{bug(471020)}}).</li>
+ <li>Los prefijos de cookies <strong><code>__Host-</code></strong> and <strong><code>__Secure-</code></strong> han sido implementados. Ver {{HTTPHeader("Set-Cookie")}} y {{bug(1283368)}}.</li>
+ <li>El encabezado {{HTTPHeader("Referrer-Policy")}} ha sido implementado {{bug(1264164)}}.</li>
+</ul>
+
+<h3 id="Seguridad">Seguridad</h3>
+
+<ul>
+ <li>El atributo {{htmlattrxref("ping", "a")}} del elemento {{htmlelement("a")}} ahora se apega al <code><a href="https://developer.mozilla.org/es/docs/Web/Security/CSP/CSP_policy_directives#connect-src">connect-src</a></code> <a href="https://developer.mozilla.org/es/docs/Web/Security/CSP/CSP_policy_directives">CSP 1.1 policy directive</a> ({{bug(1100181)}}).</li>
+ <li>Agregado soporte para la directiva <code><a href="https://developer.mozilla.org/es/docs/Web/Security/CSP/CSP_policy_directives#sandbox">sandbox</a></code> <a href="/en-US/docs/Web/Security/CSP">CSP</a> ({{bug(671389)}}).</li>
+ <li>Ahora es posible indicar una política <a href="/es/docs/Web/API/Web_Workers_API/Using_web_workers#Content_security_policy">content security policy for workers</a> ({{bug (959388)}}).</li>
+ <li>El método {{domxref("Navigator.sendBeacon()")}} ya no lanza una excepción si los datos de la baliza (Beacon Data) no pudieron ser enviados devido a una política de restricción consentimiento method <a href="/es/docs/Web/Security/CSP">Content Security Policy</a>; en su lugar, retorna <code>false</code> como es esperado ({{bug(1234813)}}).</li>
+</ul>
+
+<h3 id="Redes">Redes</h3>
+
+<ul>
+ <li>Cuando un error es encontrado durante una {{domxref("XMLHttpRequest")}} asíncrona, el método {{domxref("XMLHttpRequest.getAllResponseHeaders()")}} ahora retorna un string vacio ({{bug(1286744)}}).</li>
+ <li>En lugar de retornar un <code>NetworkError</code>, ahora el asynchronous {{domxref("XMLHttpRequest")}} asíncrono que falla por CORS u otras restricciones de red, ahora lanza un {{event("error")}} que puede ser capturado como cualquier otro error ({{bug(709991)}}).</li>
+ <li>{{domxref("XMLHttpRequest.getResponseHeader()")}} y {{domxref("XMLHttpRequest.getAllResponseHeaders()")}} ahora también retornan encabezados vacíos por defecto. Esto puede ser controlado mediante la preferencia <code>network.http.keep_empty_response_headers_as_empty_string</code> ({{bug(918721)}}).</li>
+ <li>La opción <code>only-if-cached</code> fue agregada a <code><a href="https://developer.mozilla.org/es/docs/Web/API/Request/cache">Request.cache</a></code> ({{bug(1272436)}}).</li>
+</ul>
+
+<h3 id="DOM">DOM</h3>
+
+<ul>
+ <li>Ahora la opción <code>once</code> para {{domxref("EventTarget.addEventListener()")}} es soportada ({{bug(1287706)}}).</li>
+ <li>La interfaz {{domxref("NodeList")}} are now iterable and the methods {{domxref("NodeList.forEach()", "forEach()")}}, {{domxref("NodeList.values()", "values()")}}, {{domxref("NodeList.entries()")}} and {{domxref("NodeList.keys()")}} are now available ({{bug(1290636)}}).</li>
+ <li>The interface {{domxref("DOMTokenList")}} are now iterable and the methods {{domxref("DOMTokenList.forEach()", "forEach()")}}, {{domxref("DOMTokenList.values()", "values()")}}, {{domxref("DOMTokenList.entries()")}} and {{domxref("DOMTokenList.keys()")}} are now available ({{bug(1290636)}}).</li>
+ <li>The methods {{domxref("Document.createElement()")}} and {{domxref("Document.createElementNS()")}} now have an optional <code>options</code> parameter for creating <a href="/en-US/docs/Web/Web_Components/Custom_Elements">custom elements</a> ({{bug(1276579)}}).</li>
+</ul>
+
+<h3 id="SVG">SVG</h3>
+
+<ul>
+ <li>The <code>allowReorder</code> attribute has been dropped and the behavior it was setting is now the default for SVG {{SVGElement("switch")}} elements ({{bug(1279690)}}).</li>
+ <li>The <code>defer</code> keyword for the {{SVGAttr("preserveAspectRatio")}} attribute on SVG {{SVGElement("image")}} elements has been removed to follow the latest SVG2 specification ({{bug(1280425)}}).</li>
+</ul>
+
+<h3 id="Drag_and_Drop_API">Drag and Drop API</h3>
+
+<ul>
+ <li>The {{domxref("DataTransfer.items")}} property has been implemented, allowing access to multiple items being dragged and dropped using the HTML Drag and Drop API. To allow this, the {{domxref("DataTransferItem")}} and {{domxref("DataTransferItemList")}} interfaces are now supported as well ({{bug(906420)}}). This is enabled by default.</li>
+ <li>The old, obsolete Firefox specific drag and drop API events <code>dragdrop</code> and <code>draggesture</code> are no longer supported. Be sure to update any code still using them to use the <a href="/en-US/docs/Web/API/HTML_Drag_and_Drop_API">HTML drag and drop API</a> ({{bug(1162050)}}.</li>
+</ul>
+
+<h3 id="Pointer_Lock_API">Pointer Lock API</h3>
+
+<ul>
+ <li>The <a href="/en-US/docs/Web/API/Pointer_Lock_API">Pointer Lock API</a> is now unprefixed ({{bug(991899)}}).</li>
+ <li>Before Firefox 50, <code><a href="/en-US/docs/Web/API/Element/requestPointerLock">requestPointerLock()</a></code> asked for permission using a doorhanger, and pointer lock would not be enabled until the user granted permission. From Firefox 50, pointer lock is like the <a href="/en-US/docs/Web/API/Fullscreen_API">fullscreen API</a>: it's granted immediately, but a notification is displayed explaining to the user how to exit ({{bug(1273351)}}).</li>
+</ul>
+
+<h3 id="IndexedDB">IndexedDB</h3>
+
+<ul>
+ <li>Ahora se envía un evento {{event("close")}} al objeto {{domxref("IDBDatabase")}} cuando la base de datos respectiva es cerrada de forma inesperada ({{bug(1151017)}}).</li>
+</ul>
+
+<h3 id="Service_Workers">Service Workers</h3>
+
+<ul>
+ <li>The {{domxref("WindowClient.navigate()")}} method has been implemented. This method lets you open a specified URL into a client window which is being controlled by the service worker ({{bug(1218148)}}).</li>
+</ul>
+
+<h3 id="WebGL">WebGL</h3>
+
+<ul>
+ <li>The {{domxref("EXT_shader_texture_lod")}} WebGL extension has been implemented ({{bug(1111689)}}).</li>
+ <li>The texImage methods have been updated for <a href="/en-US/docs/Web/API/WebGL2RenderingContext">WebGL 2</a> to implement PBOs (<code>PIXEL_UNPACK_BUFFER</code>) ({{bug(1280499)}}).</li>
+</ul>
+
+<h3 id="WebRTC">WebRTC</h3>
+
+<ul>
+ <li>Adding a track to a {{domxref("MediaStream")}} now generates the {{event("addtrack")}} event as described in the specification. The event is of type {{domxref("MediaStreamTrackEvent")}} and is fired on the stream to which the track was added. You can use either {{domxref("EventTarget.addEventListener", "MediaStream.addEventListener('addtrack', ...)")}} or the {{domxref("MediaStream.onaddtrack")}} property to handle <code>"addtrack"</code> events.</li>
+ <li>The {{domxref("MediaStreamTrack")}} interface now supports the {{event("ended")}} event and the {{domxref("MediaStreamTrack.onended")}} event handler.</li>
+ <li>Firefox now supports the {{domxref("MediaStreamTrack.readyState")}} property, which indicates whether the track is live or permanently ended.</li>
+ <li>The {{domxref("MediaStreamTrack")}} methods {{domxref("MediaStreamTrack.getConstraints", "getConstraints()")}} and {{domxref("MediaStreamTrack.getSettings", "getSettings()")}} have been implemented; these let you get the most recently applied set of customized property constraints and the actual values of all of the track's constrainable properties, respectively. The accompanying data types have been documented as well.</li>
+ <li>The {{domxref("RTCDataChannel.stream")}} property has been removed. This was replaced with {{domxref("RTCDataChannel.id")}} in <a href="/en-US/docs/Mozilla/Firefox/Releases/24">Firefox 24</a>, but was supported for backward compatibility. Please be sure to update your code to use the <code>id</code> property if you haven't done so yet.</li>
+</ul>
+
+<h3 id="Web_Audio_API">Web Audio API</h3>
+
+<ul>
+ <li>The {{domxref("PannerNode")}} interface now supports the 3D Cartesian space properties for the position ({{domxref("PannerNode.positionX")}}, {{domxref("PannerNode.positionY")}}, and {{domxref("PannerNode.positionZ")}}) and directionality ({{domxref("PannerNode.orientationX")}}, {{domxref("PannerNode.orientationY")}}, {{domxref("PannerNode.orientationZ")}}) of an audio source.</li>
+ <li>The interface {{domxref("IIRFilterNode")}}, which implements a general {{interwiki("wikipedia", "infinite impulse response")}} (IIR) filter, has been implemented.</li>
+ <li>Throttling in background tabs of timers created by {{domxref("WindowTimers.setInterval", "Window.setInterval()")}} and {{domxref("WindowTimers.setTimeout", "Window.setTimeout()")}} no longer occurs if a <a href="/en-US/docs/Web/API/Web_Audio_API">Web Audio API</a> {{domxref("AudioContext")}} is actively playing sound. This should help prevent issues with timing-sensitive audio playback (such as music players generating individual notes using timers) in the background ({{bug(1181073)}}).</li>
+</ul>
+
+<h3 id="AudioVideo">Audio/Video</h3>
+
+<ul>
+ <li>The <code>AlignSetting</code> enum (representing possible values for {{domxref("VTTCue.align")}}) incorrectly previously included the value <code>"middle"</code> instead of <code>"center"</code>. This has been corrected ({{bug(1276130)}}).</li>
+ <li>The non-standard and experimental method {{domxref("HTMLMediaElement.seekToNextFrame()")}} now seeks to the next frame in the media asynchronously, rather than synchronously, and returns a {{jsxref("Promise")}} which resolves once the seek is complete.</li>
+ <li>The implementation of {{domxref("HTMLTrackElement")}} has been corrected to allow {{HTMLElement("track")}} elements to load resources even if not in a document ({{bug(871747)}}).</li>
+</ul>
+
+<h3 id="API_de_batería">API de batería</h3>
+
+<ul>
+ <li>The {{domxref("navigator.battery")}} property, which has been deprecated since Firefox 43, is now obsolete and has been removed. Use the {{domxref("navigator.getBattery()")}} method instead to get a battery {{jsxref("Promise")}}, which will resolve when the {{domxref("BatteryManager")}} is available for use; the {{domxref("BatteryManager")}} is passed into the fulfillment handler for the promise ({{bug(12593355)}}).</li>
+</ul>
+
+<h3 id="Archivos_y_directorios">Archivos y directorios</h3>
+
+<ul>
+ <li>A subset of the <a href="/en-US/docs/Web/API/File_and_Directory_Entries_API">File and Directory Entries API</a> has been implemented, to improve compatibility with sites that were previously only compatible with Google Chrome ({{bug(1265767)}}).
+
+  <ul>
+   <li>The asynchronous API interfaces have been implemented, with the caveat that only reading of files is supported; for example, the {{domxref("FileSystemFileEntry.createWriter()")}} method is a no-op.</li>
+   <li>These interfaces have been implemented:
+    <ul>
+     <li>{{domxref("FileSystem")}}</li>
+     <li>{{domxref("FileSystemEntry")}} (properties only; the methods have not been implemented)</li>
+     <li>{{domxref("FileSystemFileEntry")}} (except for {{domxref("FileSystemFileEntry.createWriter", "createWriter()")}})</li>
+     <li>{{domxref("FileSystemDirectoryEntry")}} (except for {{domxref("FileSystemDirectoryEntry.removeRecursively", "removeRecursively()")}})</li>
+     <li>{{domxref("FileSystemDirectoryReader")}}</li>
+    </ul>
+   </li>
+   <li>{{domxref("HTMLInputElement.webkitdirectory")}} as well as the {{HTMLattrxref("webkitdirectory", "input")}} attribute of the {{HTMLElement("input")}} element have been implemented; this lets you configure a file input to accept directories instead of files ({{bug(1258489)}}).</li>
+   <li>{{domxref("HTMLInputElement.webkitEntries")}} has been implemented; this returns an array of {{domxref("FileSystemEntry")}}-based objects representing the selected items.</li>
+   <li>{{domxref("File.webkitRelativePath")}} has been implemented; this contains the path of the file relative to the root of the containing {{domxref("FileSystemDirectoryEntry")}} that was among the items in the list returned by {{domxref("HTMLInputElement.webkitGetEntries()")}}.</li>
+   <li>See <a href="/en-US/docs/Web/API/File_and_Directory_Entries_API/Firefox_support">File and Directory Entries API support in Firefox</a> for details about what we do and do not support in this API.</li>
+   <li>These APIs are now enabled by default; some were previously available but only behind a preference ({{bug(1288683)}}).</li>
+  </ul>
+ </li>
+ <li>We've implemented {{domxref("DataTransferItem.webkitGetAsEntry()")}} as part of the <a href="/en-US/docs/Web/API/File_and_Directory_Entries_API">File and Directory Entries API</a>; this lets you obtain a {{domxref("FileSystemEntry")}} representing a dropped file ({{bug(1289255)}}). This is enabled by default.</li>
+ <li>The <code>HTMLInputElement.directory</code> property, part of the <a href="https://wicg.github.io/directory-upload/proposal.html">Directory Upload API</a> proposal, has been renamed to <code>allowdirs</code> ({{bug(1288681)}}). This property is hidden behind a preference.</li>
+</ul>
+
+<h2 id="Ver_también">Ver también</h2>
+
+<ul>
+ <li><a href="https://www.fxsitecompat.com/en-US/versions/50">Compatibilidad de sitios para Firefox 50</a></li>
+</ul>
+
+<h2 id="Versiones_anteriores">Versiones anteriores</h2>
+
+<p>{{Firefox_for_developers(49)}}</p>
diff --git a/files/es/mozilla/firefox/releases/57/index.html b/files/es/mozilla/firefox/releases/57/index.html
new file mode 100644
index 0000000000..557684e1fa
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/57/index.html
@@ -0,0 +1,299 @@
+---
+title: Firefox Quantum 57 para programadores
+slug: Mozilla/Firefox/Releases/57
+tags:
+  - '57'
+  - Firefox
+  - Notas de publicación
+translation_of: Mozilla/Firefox/Releases/57
+---
+<div>{{FirefoxSidebar}}</div><p class="summary">Este artículo proporciona información sobre los cambios incluidos en Firefox 57 (también conocido como Firefox Quantum) que conciernen a los desarrolladores. Firefox 57 se disponibilizó al público el <a href="https://wiki.mozilla.org/RapidRelease/Calendar#Future_branch_dates">14 de noviembre de 2017</a>.</p>
+
+<h2 id="Firefox_57_Firefox_Quantum">Firefox 57 === Firefox Quantum</h2>
+
+<p>Hemos bautizado a Firefox 57 como <strong>Quantum</strong> por el proyecto de ingeniería <a href="https://wiki.mozilla.org/Quantum">Firefox Quantum</a>, cuyo objetivo ha sido el de reconstruir Firefox desde cero para darle un rendimiento y una estabilidad excelentes, así como mejorar su apariencia visual. Esta es la primera versión de Firefox en incluir algunos de estos cambios, así que quisimos conmemorar el acontecimiento.</p>
+
+<div class="note">
+<p><strong>Nota</strong>: para obtener más información sobre las funciones de Quantum incluidas en esta versión, consúltese el artículo <a href="https://hacks.mozilla.org/2017/09/firefox-quantum-developer-edition-fastest-firefox-ever/">«Firefox Quantum Developer Edition: el Firefox más rápido, con IU Photon y mejores herramientas»</a>, escrito por Dan Callahan.</p>
+</div>
+
+<p><a href="https://hacks.mozilla.org/2017/08/inside-a-super-fast-css-engine-quantum-css-aka-stylo/">El nuevo procesador de CSS en paralelo de Firefox</a> ―también denominado <strong>Quantum CSS</strong> o <strong>Stylo</strong>― está activado de manera predeterminada en Firefox 57 para escritorio; las versiones para móviles darán el salto en el futuro. Los programadores no deberían notar ninguna diferencia importante, aparte de la amplia gama de mejoras de rendimiento. Sin embargo, existen algunas diferencias menores de funcionalidad en Stylo, las cuales se han implementado para corregir comportamientos no estándares de Gecko que habrían de desaparecer. Informaremos de esas diferencias en las páginas de referencia y en las notas de publicación según proceda (véanse {{anch("Notas sobre Quantum CSS")}}).</p>
+
+<article class="text-content" id="wikiArticle">
+<h2 id="Cambios_para_programadores_web">Cambios para programadores web</h2>
+
+<h3 id="Herramientas_de_desarrollo">Herramientas de desarrollo</h3>
+
+<p><em>No hay ningún cambio.</em></p>
+
+<h3 id="HTML">HTML</h3>
+
+<ul>
+ <li>Los tipos <a href="/en-US/docs/Web/HTML/Element/input/date">«date»</a> y <a href="/en-US/docs/Web/HTML/Element/input/time">«time»</a> de {{htmlelement("input")}} ya están activados en todas las compilaciones ({{bug("1399036")}}).</li>
+</ul>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li>Ahora admitimos los valores <code>minimal-ui</code> y <code>standalone</code> de la consulta <code><a href="/en-US/docs/Web/CSS/@media/display-mode">display-mode</a></code> ({{bug(1369815)}}). Consúltese también el <a href="/en-US/docs/Web/Manifest#display">campo de manifiesto de aplicación web <code>display</code></a>.</li>
+ <li>Se corrigió un problema que causaba que la notación abreviada de la cuadrícula quedara restablecida al utilizar {{cssxref("grid-row-gap")}} y {{cssxref("grid-column-gap")}} ({{bug(1387410)}}).</li>
+ <li>Se ha eliminado la preferencia <code>layout.css.clip-path-shapes.enabled</code>, que permitía activar o desactivar la compatibilidad de {{cssxref("&lt;basic-shape&gt;")}} con {{cssxref("clip-path")}} ({{bug(1399767)}}).</li>
+</ul>
+
+<h4 id="Notas_sobre_Quantum_CSS">Notas sobre Quantum CSS</h4>
+
+<ul>
+ <li>Los valores de degradados radiales tales como <code>radial-gradient(circle gold,red)</code> funcionan en el sistema de estilos de Gecko anterior, pero no debería por la coma faltante entre <code>circle</code> y <code>gold</code> ({{bug(1383323)}}). Quantum corrige este defecto.</li>
+ <li>Cuando se da animación a un elemento ubicado fuera de la pantalla y se establece un tiempo de retardo, Gecko no actualiza la visualización correctamente en algunas plataformas, como Windows ({{bug(1383239)}}). Esto ha quedado corregido en Quantum.</li>
+ <li>En Gecko, no es posible desplegar de manera predeterminada los elementos {{htmlelement("details")}} mediante el atributo <code>open</code> si tienen una propiedad {{cssxref("animation")}} activa ({{bug(1382124)}}). Quantum corrige este problema.</li>
+ <li>En Gecko, los efectos {{cssxref("transition", "transitions")}} no funcionan si se transiciona desde un {{cssxref("text-shadow")}} con un color especificado a un <code>text-shadow</code> sin ningún color  ({{bug(726550)}}). Este comportamiento se ha corregido en Quantum.</li>
+ <li>En Gecko, cancelar una animación de relleno (p. ej., con <code>animation-fill-mode: forwards</code> definido) puede desencadenar un conjunto de transiciones en el mismo elemento, aunque únicamente una vez (véase el {{bug(1192592)}} y <a href="https://bug1192592.bmoattachments.org/attachment.cgi?id=8843824">estas pruebas</a> para más información). Por lo general, las animaciones declaratorias no deberían desencadenar animaciones. Esto se ha corregido en Quantum.</li>
+ <li>En Gecko, las animaciones que utilizan ems como unidad no reciben las modificaciones realizadas en {{cssxref("font-size")}} en el elemento padre del elemento animado, aunque deberían ({{bug(1254424)}}). Quantum CSS corrige esto.</li>
+ <li>Gecko además maneja la herencia de <code>font-size</code> de manera diferente a la de Quantum CSS, por lo que para algunas configuraciones de idioma, los tamaños de letra heredados quedaban más pequeños de lo esperado (véase {{bug(1391341)}}). Quantum corrige esto.</li>
+ <li>Gecko reutiliza el mismo mecanismo empleado al analizar una ficha de URL durante el análisis de las funciones <code>domain()</code> o <code>url-prefix()</code> para la regla {{cssxref("@document", "@-moz-document")}}. Quantum CSS no utiliza el mismo mecanismo y no considera las fichas como no válidas cuando contienen paréntesis o comillas ({{bug(1362333)}}).</li>
+ <li>En Gecko, cuando se define un tipo de letra del sistema como el valor del {{domxref("CanvasRenderingContext2D.font", "tipo de letra")}} de algún contexto del lienzo 2D (p. ej., <code>menu</code>), la obtención del valor del tipo de letra no devuelve el resultado correcto (no devuelve nada). Este problema quedó solucionado en Quantum. ({{bug(1374885)}}).</li>
+ <li>En Gecko, cuando se crea un subárbol desligado (p. ej., un {{htmlelement("div")}} creado a través de {{domxref("Document.createElement","createElement()")}} que todavía no se inserta en el DOM), el elemento raíz del subárbol se define como un elemento de nivel bloque. En Quantum CSS, el elemento se define como alineado, tal como se define en la especificación ({{bug(1374994)}}).</li>
+ <li>Gecko rechaza las expresiones {{cssxref("calc")}} ―lo que invalida el valor― cuando se utilizan como el componente radial de una función {{cssxref("radial-gradient")}} ({{bug(1376019)}}). Quantum CSS lo resuelve.</li>
+ <li>En Gecko, <code>calc(1*2*3)</code> no es analizado debidamente; Quantum CSS soluciona el problema ({{bug(1379467)}}).</li>
+ <li>En Quantum CSS, <a href="https://drafts.csswg.org/css-values-3/#calc-notation"><code>calc()</code> se admite en todos los sitios que la especificación indica</a> ({{bug(1350857)}}). En Gecko, este no es el caso.</li>
+ <li>Gecko contiene un defecto que provoca que los pseudoelementos {{cssxref("::before")}} y {{cssxref("::after")}} se generen aun si el valor de la propiedad {{cssxref("content")}} se define como <code>normal</code> o <code>none</code>. Este comportamiento es contrario a la especificación ({{bug(1387931)}}) y se ha corregido en Quantum.</li>
+ <li>Otro defecto de Gecko provoca que la propiedad {{cssxref("background-position")}} no pueda transicionarse entre dos valores que contengan números diferentes de valores {{cssxref("&lt;position&gt;")}}, por ejemplo, <code>background-position: 10px 10px;</code> y <code>background-position: 20px 20px, 30px 30px;</code> (véase {{bug(1390446)}}). Quantum resuelve el error.</li>
+</ul>
+
+<h3 id="SVG">SVG</h3>
+
+<p><em>No hay ningún cambio.</em></p>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<ul>
+ <li>El bucle no estándar {{jsxref("Statements/for_each...in", "for each...in")}} (E4X) fue eliminado. En su lugar, utilícese {{jsxref("Statements/for...of", "for...of")}} y consúltese <a href="/en-US/docs/Web/JavaScript/Reference/Errors/For-each-in_loops_are_deprecated">Atención: los bucles de JavaScript 1.6 «for-each-in» son obsoletos</a> para obtener ayuda en la migración. ({{bug(1083470)}}).</li>
+ <li>Se marcaron como obsoletos los métodos {{jsxref("Object.prototype.watch()")}} y {{jsxref("Object.unwatch", "unwatch()")}}. Se emitirá una alerta si se utilizan y serán eliminados en el futuro próximo ({{bug(934669)}}).</li>
+ <li>Se eliminaron los objetos {{jsxref("Iterator")}} y {{jsxref("StopIteration")}} y el protocolo de iteración heredado ({{bug(1098412)}}).</li>
+</ul>
+
+<h3 id="API">API</h3>
+
+<h4 id="API_nuevas">API nuevas</h4>
+
+<ul>
+ <li>Se ha activado de manera predeterminada la API {{domxref("PerformanceObserver")}} ({{bug(1386021)}}).</li>
+ <li>Añadimos las interfaces {{domxref("AbortController")}} y {{domxref("AbortSignal")}} (conocidas como la API «Abort»), que permiten interrumpir las solicitudes del DOM (como las de <a href="/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch">recuperación</a>) si así se desea ({{bug(1378342)}}).</li>
+</ul>
+
+<h4 id="DOM">DOM</h4>
+
+<ul>
+ <li>Se ha implementado la propiedad {{domxref("Selection.type")}} de la <a href="/en-US/docs/Web/API/Selection_API">API Selection</a> ({{bug(1359157)}}).</li>
+ <li>Se admite {{domxref("Document.createEvent", "Document.createEvent('FocusEvent')")}} ahora ({{bug(1388069)}}).</li>
+ <li>La propiedad <code>files</code> de la interfaz {{domxref("HTMLInputElement")}} puede definirse ahora ({{bug(1384030)}}).</li>
+ <li>El método <code>HTMLDocument.getSelection()</code> se ha trasladado a la interfaz {{domxref("Document.getSelection","Document")}} para que quede disponible para los documentos XML ({{bug(718711)}}).</li>
+ <li>Hemos implementado el suceso {{Event("messageerror")}}, el cual puede ejecutar código tras su desencadenamiento por parte de manejadores de sucesos utilizados en destinos de mensajes. Véase {{domxref("MessagePort.onmessageerror")}}, {{domxref("DedicatedWorkerGlobalScope.onmessageerror")}}, {{domxref("Worker.onmessageerror")}}, {{domxref("BroadcastChannel.onmessageerror")}} y {{domxref("Window.onmessageerror")}} ({{bug(1359017)}}).</li>
+ <li>Cuando se emplea la iteración en valores {{domxref("Headers")}}, estos quedarán organizados en orden lexicográfico y se combinarán los valores de los nombres de cabeceras duplicados ({{bug(1396848)}}).</li>
+</ul>
+
+<h4 id="Sucesos_de_DOM">Sucesos de DOM</h4>
+
+<p><em>No hay ningún cambio.</em></p>
+
+<h4 id="Multimedia_y_WebRTC">Multimedia y WebRTC</h4>
+
+<ul>
+ <li>Ahora se admiten mensajes de cualquier tamaño (hasta 1 GiB, aunque 256 kiB es más interoperativo) en {{domxref("RTCDataChannel")}} por medio del uso de la opción «end-of-record» (EOR) en los mensajes de SCTP. Consúltese {{SectionOnPage("/en-US/docs/Web/API/WebRTC_API/Using_data_channels", "Understanding message size limits")}} para obtener más información ({{bug(979417)}}).
+  <div class="note">Como Firefox aún no admite el protocolo ndata de SCTP, que permite intercalar mensajes de SCTP de varias fuentes, enviar objetos de datos grandes puede causar retardos importantes en el resto del tránsito SCTP. Véase el {{bug(1381145)}} para estar al tanto de la implementación de ndata en Firefox.</div>
+ </li>
+ <li>El método {{domxref("RTCDataChannel.send()")}} ahora puede emitir una excepción <code>TypeError</code> si el tamaño del mensaje que se intenta enviar no es compatible con el agente de usuario de destino (esto se implementó como parte del {{bug(979417)}}).</li>
+ <li>La <a href="/en-US/docs/Web/API/MediaStream_Recording_API">API MediaStream Recording</a> se ha actualizado de modo que los sucesos {{event("error")}} que se envíen para notificar problemas acaecidos durante la grabación son ahora del tipo {{domxref("MediaRecorderErrorEvent")}} en lugar de sucesos genéricos.</li>
+ <li>Se actualizó la documentación concerniente a {{domxref("OfflineAudioContext")}}, dado que sus entradas de constructores pueden especificarse ahora dentro de un objeto en lugar de una lista de parámetros ({{bug(1388591)}}).</li>
+</ul>
+
+<h3 id="Seguridad">Seguridad</h3>
+
+<ul>
+ <li>Los URL <code>resource://</code> ya no filtran información ({{bug(863246)}})</li>
+ <li>Los URI de datos ahora se manipulan como orígenes opacos únicos, en vez de heredar el origen del objeto de configuración responsable de la navegación ({{bug(1324406)}}).</li>
+</ul>
+
+<h3 id="Plugins"><em>Plugins</em></h3>
+
+<p><em>No hay ningún cambio.</em></p>
+
+<h3 id="Otros">Otros</h3>
+
+<ul>
+ <li>El valor <code>fullscreen</code> del campo <code>display</code> del <a href="/en-US/docs/Web/Manifest">manifiesto de aplicación web</a> ahora funciona en Firefox para Android 57 ({{bug(1126479)}}).</li>
+ <li>La <a href="/en-US/docs/Mozilla/Firefox/Headless_mode">modalidad sin periféricos</a> de Firefox ahora incluye el parámetro <code>-screenshot</code>, que permite a los usuarios tomar capturas de pantalla de sitios web directamente desde la consola ({{bug(1378010)}}).</li>
+</ul>
+
+<h2 id="Eliminaciones_de_la_plataforma_web">Eliminaciones de la plataforma web</h2>
+
+<h3 id="HTML_2">HTML</h3>
+
+<ul>
+ <li><code>&lt;link rel="preload"&gt;</code> (véase <a href="/en-US/docs/Web/HTML/Preloading_content">Precargar contenido con rel="preload"</a>) fue desactivado en Firefox 57 a causa de varios problemas de compatibilidad con la web (p. ej., {{bug(1405761)}}). Se espera que para Firefox 58 quede lista la versión de reemplazo, la cual funcionará para recursos no almacenables en la antememoria.</li>
+</ul>
+
+<h3 id="API_2">API</h3>
+
+<ul>
+ <li>La <a href="/en-US/docs/Archive/Social_API">API Social</a>, privativa de Mozilla, se ha eliminado completamente ({{bug(1388902)}}).</li>
+</ul>
+
+<h3 id="SVG_2">SVG</h3>
+
+<p><em>No hay ningún cambio.</em></p>
+
+<h2 id="Cambios_relativos_a_los_complementos_y_los_programadores_de_Mozilla">Cambios relativos a los complementos y los programadores de Mozilla</h2>
+
+<div class="note">
+<p>A partir de Firefox 57, se ha eliminado por completo la compatibilidad con los complementos basados en la tecnología XPCOM. Todas las extensiones deben convertirse para emplear la <a href="/en-US/Add-ons/WebExtensions">tecnología nueva</a>, conocida como WebExtensions, o de lo contrario dejarán de funcionar.</p>
+</div>
+
+<h3 id="WebExtensions">WebExtensions</h3>
+
+<p>Se añadieron o ampliaron las API siguientes:</p>
+
+<ul>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/bookmarks">bookmarks</a></code>
+
+  <ul>
+   <li>compatibilidad con separadores mediante <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/bookmarks/BookmarkTreeNodeType">bookmarks.BookmarkTreeNodeType</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/browser_action">browser_action</a></code>
+  <ul>
+   <li>propiedad <code>theme_icons</code> para iconos claros u oscuros en función del tema</li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserAction">browserAction</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserAction/openPopup">browserAction.openPopup()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserSettings">browserSettings</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserSettings/allowPopupsForUserEvents">allowPopupsForUserEvents</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserSettings/homepageOverride">homepageOverride</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserSettings/imageAnimationBehavior">imageAnimationBehavior</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserSettings/newTabPageOverride">newTabPageOverride</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browsingData">browsingData</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browsingData/removeLocalStorage">browsingData.removeLocalStorage()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/clipboard">clipboard</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/clipboard/setImageData">setImageData()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/contextualIdentities">contextualIdentities</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/contextualIdentities/onCreated">onCreated</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/contextualIdentities/onRemoved">onRemoved</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/contextualIdentities/onUpdated">onUpdated</a></code></li>
+   <li><code>colorCode</code> y <code>iconUrl</code> en <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/contextualIdentities/ContextualIdentity">contextualIdentitities.ContextualIdentity</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools.panels">devtools.panels</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/devtools.panels/ElementsPanel/createSidebarPane">devtools.panels.ElementsPanel.createSidebarPane()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/downloads">downloads</a></code>
+  <ul>
+   <li>opción <code>incognito</code> en <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/downloads/download">downloads.download()</a></code></li>
+   <li>propiedad <code>estimatedEndTime</code> en <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/downloads/DownloadItem">downloads.DownloadItem</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/Add-ons/WebExtensions/API/find">find</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/find/find">find()</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/find/highlightResults">highlightResults()</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/find/removeHighlighting">removeHighlighting()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/pageAction/openPopup">pageAction.openPopup()</a></code></li>
+ <li><code><a href="/en-US/Add-ons/WebExtensions/API/privacy/websites">privacy</a></code>
+  <ul>
+   <li><code><a href="/en-US/Add-ons/WebExtensions/API/privacy/websites">websites.trackingProtectionMode</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/proxy">proxy</a></code>
+  <ul>
+   <li><code>FindProxyForURL()</code> puede devolver un objeto ahora</li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/runtime">runtime</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/runtime/openOptionsPage">runtime.openOptionsPage()</a></code> funciona en Android</li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions">sessions</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/setTabValue">setTabValue()</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/getTabValue">getTabValue()</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/removeTabValue">removeTabValue()</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/setWindowValue">setWindowValue()</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/getWindowValue">getWindowValue()</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/removeWindowValue">removeWindowValue()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sidebarAction">sidebarAction</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sidebarAction/open">sidebarAction.open()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/storage">storage</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/storage/managed">storage.managed</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs">tabs</a></code>
+  <ul>
+   <li>opción <code>loadReplace</code> en <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/update">tabs.update()</a></code></li>
+   <li>propiedad <code>discarded</code> en <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/Tab">tabs.Tab</a></code>, <code><a href="/en-US/docs/">tabs.onUpdated</a></code> y <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/query">tabs.query()</a></code></li>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/create">tabs.create()</a></code> puede abrir URL con «view-source:»</li>
+   <li>propiedad <code>openerTabId</code> en <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/Tab">tabs.Tab</a></code>, <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/create">tabs.create()</a></code>, <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/query">tabs.query()</a></code> y <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/update">tabs.update()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/theme">theme</a></code>
+  <ul>
+   <li><code>colors.toolbar</code></li>
+   <li><code>colors.toolbar_field</code></li>
+   <li><code>colors.toolbar_field_text</code></li>
+   <li><code>colors.toolbar_text</code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/theme">theme</a></code>
+  <ul>
+   <li>opción <code>windowId</code> para <code><a href="/en-US/Add-ons/WebExtensions/API/theme/update">theme.update()</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest">webRequest</a></code>
+  <ul>
+   <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest/filterResponseData">filterResponseData()</a></code></li>
+   <li>propiedad <code>proxyInfo</code> en sucesos <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/webRequest">webRequest</a></code></li>
+  </ul>
+ </li>
+ <li><code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/windows">windows</a></code>
+  <ul>
+   <li>opción <code>allowScriptsToClose</code> en <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/windows/create">windows.create()</a></code></li>
+  </ul>
+ </li>
+</ul>
+
+<h2 id="Véase_también">Véase también</h2>
+
+<ul>
+ <li><a href="https://www.fxsitecompat.com/en-US/versions/57">Compatibilidad de sitios con Firefox 57</a></li>
+</ul>
+</article>
+
+<ul>
+</ul>
+
+<h2 id="Versiones_anteriores"> Versiones anteriores</h2>
+
+<p>{{Firefox_for_developers(56)}}</p>
diff --git a/files/es/mozilla/firefox/releases/61/index.html b/files/es/mozilla/firefox/releases/61/index.html
new file mode 100644
index 0000000000..49fbfdb07c
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/61/index.html
@@ -0,0 +1,135 @@
+---
+title: Firefox 61 for developers
+slug: Mozilla/Firefox/Releases/61
+translation_of: Mozilla/Firefox/Releases/61
+---
+<div>{{FirefoxSidebar}}</div><div>{{draft}}</div>
+
+<p class="summary">Este artículo muestra información sobre los cambios en Firefox 61 que afectarán a los desarrolladores. Firefox 61 es la versión beta actual de Firefox, y se lanzará el 26 de Junio de 2018.</p>
+
+<h2 id="Cambios_para_desarrolladores_web">Cambios para desarrolladores web</h2>
+
+<h3 id="Herramientas_de_desarrollador">Herramientas de desarrollador</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="HTML">HTML</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="CSS">CSS</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="SVG">SVG</h3>
+
+<ul>
+ <li>Las propiedades <code>ping</code>, <code>rel</code>, <code>referrerPolicy</code>, <code>relList</code>, <code>hreflang</code>, <code>type</code> y <code>text</code> han sido añadidas al elemento {{SVGElement("a")}}  ({{domxref("SVGAElement")}}) para ser consistente con el elemento HTML {{HTMLElement("a")}} ({{bug("1451823")}}).</li>
+ <li> El elemento {{SVGElement("textPath")}}({{domxref("SVGTextPathElement")}}) ahora soporta el <code>path</code> SVG2 y los atributos <code>side</code> ({{bug("1446617")}} y {{bug("1446650")}}).</li>
+ <li>La interfaz {{domxref("SVGGeometryElement")}} ahora es soportada por más elementos y no solo para el elemento {{SVGElement("path")}}  ({{bug("1325320")}}).</li>
+</ul>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<ul>
+ <li>Los metodos {{jsxref("String.prototype.trimStart()")}} y {{jsxref("String.prototype.trimEnd()")}} han sido implementados (mira {{bug(1434007)}}). <code>trimLeft</code> y <code>trimRight</code> permanecen como alias por razones de compatibilidad web.</li>
+</ul>
+
+<h3 id="APIs">APIs</h3>
+
+<h4 id="Nueva_APIs">Nueva APIs</h4>
+
+<p><em>No hay cambios.</em></p>
+
+<h4 id="DOM">DOM</h4>
+
+<p><em>No hay cambios.</em></p>
+
+<h4 id="Eventos_DOM">Eventos DOM</h4>
+
+<p><em>No hay cambios.</em></p>
+
+<h4 id="Trabajadores_del_servicio">Trabajadores del servicio</h4>
+
+<p><em>No hay cambios.</em></p>
+
+<h4 id="Media_y_WebRTC">Media y WebRTC</h4>
+
+<p><em>No hay cambios.</em></p>
+
+<h4 id="Canvas_y_WebGL">Canvas y WebGL</h4>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="CSSOM">CSSOM</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="HTTP">HTTP</h3>
+
+<ul>
+ <li>La cookie <code><strong>SameSite</strong></code> ha sido implementada. Mira <a href="/en-US/docs/Web/HTTP/Headers/Set-Cookie">Set-Cookie</a> y <a href="/en-US/docs/Web/HTTP/Cookies">HTTP cookies</a> ({{bug(795346)}}).</li>
+</ul>
+
+<h3 id="Seguridad">Seguridad</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="Plugins">Plugins</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="Otros">Otros</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h2 id="Eliminaciones_de_la_plataforma_web">Eliminaciones de la plataforma web</h2>
+
+<h3 id="HTML_2">HTML</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="CSS_2">CSS</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="APIs_2">APIs</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h3 id="SVG_2">SVG</h3>
+
+<ul>
+ <li>La obsoleta (y nunca implementada correctamente) propiedad {{domxref("SVGViewElement")}}<code>.viewTarget</code> ha sido eliminada ({{bug(1455763)}}).</li>
+ <li>Las siguientes propiedades obsoletas han sido eliminadas de {{domxref("SVGSVGElement")}} ({{bug(1133172)}}):
+  <ul>
+   <li><code>pixelUnitToMillimeterX</code></li>
+   <li><code>pixelUnitToMillimeterY</code></li>
+   <li><code>screenPixelToMillimeterX</code></li>
+   <li><code>screenPixelToMillimeterY</code></li>
+  </ul>
+ </li>
+ <li>El constructor no-estandar <code>SVGNumber()</code> ha sido eliminado ({{bug("1455940")}}).</li>
+</ul>
+
+<h3 id="Otros_2">Otros</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h2 id="Cambios_para_modificaciones_y_desarrolladores_de_Mozilla">Cambios para modificaciones y desarrolladores de Mozilla</h2>
+
+<h3 id="Extensiones_web">Extensiones web</h3>
+
+<p><em>No hay cambios.</em></p>
+
+<h2 id="También_puedes_ver">También puedes ver</h2>
+
+<ul>
+ <li>Compatibilidad de sitios para Firefox 61</li>
+</ul>
+
+<h2 id="Versiones_anteriores">Versiones anteriores</h2>
+
+<p>{{Firefox_for_developers(60)}}</p>
+
+<p> </p>
diff --git a/files/es/mozilla/firefox/releases/62/index.html b/files/es/mozilla/firefox/releases/62/index.html
new file mode 100644
index 0000000000..ccc68fce29
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/62/index.html
@@ -0,0 +1,235 @@
+---
+title: Firefox 62 for developers
+slug: Mozilla/Firefox/Releases/62
+translation_of: Mozilla/Firefox/Releases/62
+---
+<div>{{FirefoxSidebar}}</div>
+
+<p class="summary">Este artículo provee información sobre los cambios de Firefox 62 que van a afectar a los programadores. Firefox 62 ha sido lanzado en 5 de septiembre, 2018.</p>
+
+<h2 id="Cambios_para_programadores_de_red">Cambios para programadores de red</h2>
+
+<h3 id="Herramientas_para_programadores">Herramientas para programadores</h3>
+
+<ul>
+ <li>La editor de formas ya está disponible por defecto -- vea a <a href="/en-US/docs/Tools/Page_Inspector/How_to/Edit_CSS_shapes">Editar formas en CSS </a>para más informacion.</li>
+ <li>You can now split the Rules view out into its own pane, separate from the other tabs on the CSS pane. See <a href="/en-US/docs/Tools/Page_Inspector/3-pane_mode">Page inspector 3-pane mode</a> for more details.</li>
+ <li>The Grid inspector has updated features, and all new documentation — see <a href="/en-US/docs/Tools/Page_Inspector/How_to/Examine_grid_layouts">CSS Grid Inspector: Examine grid layouts</a>.</li>
+ <li>You now have four options for the location of the Developer Tools. In addition to the default location on the bottom of the window, you can choose to locate the tools on either the left or right sides of the main window or in a separate window ({{bug(1192642)}}).</li>
+ <li>The <a href="/en-US/docs/Tools/Accessibility_inspector">Accessibility inspector</a> has had a couple of minor updates:
+  <ul>
+   <li>It no longer exposes the <code>help</code> property, which isn't properly implemented in Gecko ({{bug(1467643)}}).</li>
+   <li>The <code>keyboardShortcut</code> property now correctly exposes any keyboard shortcut available to activate the currently inspected node ({{bug(1467381)}}).</li>
+  </ul>
+ </li>
+ <li>A close button has been added to the <a href="/en-US/docs/Tools/Web_Console/Split_console">split console</a> toolbar.</li>
+ <li>If the option to "Select an iframe as the currently targeted document" is checked, the icon will appear in the toolbar while the Settings tab is displayed, even if the current page doesn't include any iframes ({{bug(1456069)}}).</li>
+ <li>The <a href="/en-US/docs/Tools/Network_Monitor">Network Monitor</a>'s <a href="/en-US/docs/Tools/Network_Monitor#Cookies">Cookies tab</a> now shows the cookie <code>samesite</code> attribute ({{bug(1452715)}}).</li>
+ <li><a href="/en-US/docs/Tools/Responsive_Design_Mode">Responsive design mode</a> now works inside container tabs ({{bug(1306975)}}).</li>
+ <li>When {{Glossary("CORS")}} errors occur and are reported on the console, Firefox now provides a link to the corresponding page in our <a href="/en-US/docs/Web/HTTP/CORS/Errors">CORS error documentation</a> ({{bug(1475391)}}).</li>
+ <li>Create a screenshot of the current page (with an optional filename) from the Console tab ({{bug(1464461)}}) using the following command:<br>
+  <br>
+  <code>:screenshot &lt;filename.png&gt; --fullpage</code><br>
+  <br>
+  where <code>&lt;filename.png&gt;</code> is the desired filename. The file will be saved to your downloads folder. The <code>--fullpage</code> parameter is optional, but if included, it will save the full web page. This option also adds <code>-fullpage</code> to the name of the file. For a list of all options available for this command, enter: <code>:screenshot --help</code></li>
+</ul>
+
+<h4 id="Removals">Removals</h4>
+
+<ul>
+ <li>The <a href="/en-US/docs/Tools/GCLI">Developer Toolbar/GCLI</a> (accessed with <kbd>Shift</kbd> + <kbd>F2</kbd>), <strong>has been removed</strong> from Firefox ({{bug(1461970)}}). Both the Developer Toolbar UI and the GCLI upstream library have become unmaintained, some of its features are broken (some ever since e10s), it is blocking the <code><span class="quote">unsafeSetInnerHTML</span></code> work, usage numbers are very low, alternatives exist for the most used commands.</li>
+</ul>
+
+<h3 id="HTML">HTML</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li><code>:-moz-selection</code> has been unprefixed to {{cssxref("::selection")}} ({{bug(509958)}}).</li>
+ <li><code>x</code> is now supported as a unit for the {{cssxref("&lt;resolution&gt;")}} type ({{bug(1460655)}}).</li>
+ <li>{{cssxref("shape-margin")}}, {{cssxref("shape-outside")}}, and {{cssxref("shape-image-threshold")}} are now enabled by default ({{bug(1457297)}}).</li>
+</ul>
+
+<h4 id="Removals_2">Removals</h4>
+
+<ul>
+ <li>All <a href="/en-US/docs/Web/CSS/display#XUL_values">XUL <code>display</code> values</a> with the exception of <code>-moz-box</code> and <code>-moz-inline-box</code> have been removed from non-XUL documents in {{bug(1288572)}}.</li>
+</ul>
+
+<h3 id="SVG">SVG</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<ul>
+ <li>The {{jsxref("WebAssembly.Global()")}} constructor is now supported, along with global variables in WebAssembly ({{bug(1464656)}}).</li>
+ <li>The {{jsxref("Array.prototype.flat()")}} and {{jsxref("Array.prototype.flatMap()")}} methods are now enabled by default ({{bug(1435813)}}).</li>
+ <li>The <code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/import.meta">import.meta</a></code> property has been implemented to expose context-specific metadata to a JavaScript module ({{bug(1427610)}}).</li>
+ <li>JavaScript <a href="/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#String_literals">string literals</a> may now directly contain the U+2028 LINE SEPARATOR and U+2029 PARAGRAPH SEPARATOR characters. As a consequence, {{jsxref("JSON")}} syntax is now a subset of JavaScript literal syntax (see {{bug(1435828)}} and the TC39 proposal <a href="https://github.com/tc39/proposal-json-superset">json-superset</a>).</li>
+ <li>For out-of-bounds <a href="/en-US/docs/Web/JavaScript/Typed_arrays">typed array</a> indexes, {{jsxref("Reflect.defineProperty()")}} and {{jsxref("Reflect.set()")}} will now return <code>false</code> instead of <code>true</code> ({{bug(1308735)}}).</li>
+</ul>
+
+<h4 id="Removals_3">Removals</h4>
+
+<ul>
+ <li>The <code>DOMPoint</code> and <code>DOMPointReadOnly</code> constructors no longer support an input parameter of type <code>DOMPointInit</code>; the values of the properties must be specified using the <code>x</code>, <code>y</code>, <code>z</code>, and <code>w</code> parameters ({{bug(1186265)}}).</li>
+ <li>The {{domxref("URL.createObjectURL()")}} method no longer supports creating object URLs to represent a {{domxref("MediaStream")}}. This capability has been obsolete for some time now, since you can now simply set {{domxref("HTMLMediaElement.srcObject")}} to the <code>MediaStream</code> directly ({{bug(1454889)}}).</li>
+</ul>
+
+<h3 id="APIs">APIs</h3>
+
+<h4 id="New_APIs">New APIs</h4>
+
+<ul>
+ <li>The {{domxref("Web_Speech_API", "Speech Synthesis API (Text-to-Speech)", "", "1")}} is now enabled by default on Firefox for Android ({{bug(1463496)}}).</li>
+</ul>
+
+<h4 id="DOM">DOM</h4>
+
+<ul>
+ <li>The {{domxref("DOMPointReadOnly")}} interface now supports the static function {{domxref("DOMPointReadOnly.fromPoint()")}}, which creates a new point object from a dictionary that's compatible with {{domxref("DOMPointInit")}}, which includes any {{domxref("DOMPoint")}} object. This function is also available on {{domxref("DOMPoint")}} ({{bug(1186265)}}).</li>
+ <li>For compatibility purposes, the {{domxref("Event.srcElement")}} property is now supported. It is an alias for {{domxref("Event.target")}} ({{bug(453968)}}).</li>
+ <li>{{domxref("Navigator.registerProtocolHandler()")}} now must only be called from a secure context ({{bug(1460506)}}).</li>
+ <li>The {{domxref("Navigator.registerContentHandler()")}} method has been disabled by default in preparation for being removed entirely, as it's been obsolete for some time ({{bug(1460481)}}).</li>
+ <li>The {{domxref("DataTransfer.DataTransfer", "DataTransfer()")}} constructor has been implemented ({{bug(1351193)}}).</li>
+ <li>{{domxref("Document.domain")}} can no longer return <code>null</code> ({{bug(819475)}}). If the domain cannot be identified, then <code>domain</code> returns an empty string instead of <code>null</code>.</li>
+ <li>Added the {{domxref("Console.timeLog()")}} method to display the current value of a console timer while continuing to track the time ({{bug(1458466)}}).</li>
+ <li>Added {{domxref("Console.countReset()")}} to reset a console counter value ({{bug(1459279)}}).</li>
+</ul>
+
+<h4 id="DOM_events">DOM events</h4>
+
+<p><em>No changes.</em></p>
+
+<h4 id="Service_workers">Service workers</h4>
+
+<p><em>No changes.</em></p>
+
+<h4 id="Media_Web_Audio_and_WebRTC">Media, Web Audio, and WebRTC</h4>
+
+<ul>
+ <li>The <code>"media.autoplay.enabled"</code> preference now controls automatic playback of both audio and video media, instead of just video media ({{bug(1413098)}}).</li>
+ <li>The {{domxref("ChannelSplitterNode")}} has been fixed to correctly default to having 6 channels with the <code>channelInterpretation</code> set to <code>"discrete"</code> and the <code>channelCountMode</code> set to <code>"explicit"</code>, as per the specification ({{bug(1456265)}}).</li>
+</ul>
+
+<h4 id="Removals_4">Removals</h4>
+
+<ul>
+ <li>The {{event("userproximity")}} and {{event("deviceproximity")}} events (see also {{domxref("UserProximityEvent")}} and {{domxref("DeviceProximityEvent")}}) have been disabled by default behind the <code>device.sensors.proximity.enabled</code> preference ({{bug(1462308)}}).</li>
+ <li>The {{event("devicelight")}} event (see also {{domxref("DeviceLightEvent")}}) has been disabled by default behind the <code>device.sensors.ambientLight.enabled</code> preference ({{bug(1462308)}}).</li>
+ <li>The {{event("DOMSubtreeModified")}} and {{event("DOMAttrModified")}} <a href="/en-US/docs/Web/Guide/Events/Mutation_events">mutation events</a> are no longer thrown when the {{htmlattrxref("style")}} attribute is changed via the CSSOM ({{bug(1460295)}}, see also this <a href="https://www.fxsitecompat.com/en-CA/docs/2018/domattrmodified-and-domsubtreemodified-events-are-no-longer-fired-when-style-attribute-is-changed-via-cssom/">site compatibility post</a>).</li>
+ <li>Support for {{domxref("CSSStyleDeclaration.getPropertyCSSValue()")}} has been removed ({{bug(1408301)}}).</li>
+ <li>Support for {{domxref("CSSValue")}}, {{domxref("CSSPrimitiveValue")}}, and {{domxref("CSSValueList")}} has been removed ({{bug(1459871)}}).</li>
+ <li>{{domxref("window.getComputedStyle()")}} no longer returns <code>null</code> when called on a <code>Window</code> which has no presentation ({{bug(1467722)}}).</li>
+</ul>
+
+<ul>
+</ul>
+
+<ul>
+</ul>
+
+<h3 id="HTTP">HTTP</h3>
+
+<h4 id="Removals_5">Removals</h4>
+
+<ul>
+ <li>The deprecated CSP {{CSP("referrer")}} directive has been removed. Please use the {{HTTPHeader("Referrer-Policy")}} header instead ({{bug(1302449)}}).</li>
+</ul>
+
+<h3 id="Security">Security</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="Plugins">Plugins</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="WebDriver_conformance_(Marionette)">WebDriver conformance (Marionette)</h3>
+
+<h4 id="New_features">New features</h4>
+
+<ul>
+ <li>
+  <p>Command "<code>WebDriver:ElementSendKeys</code>" has been made WebDriver conforming for file uploads ({{bug(1448792)}})</p>
+ </li>
+ <li>
+  <p>User prompts as raised by "<code>beforeunload</code>" events are automatically dismissed for "<code>WebDriver:Get</code>", "<code>WebDriver:Back</code>", "<code>WebDriver:Forward</code>", "<code>WebDriver:Refresh</code>", and "<code>WebDriver:Close</code>" commands ({{bug(1434872)}})</p>
+ </li>
+ <li>
+  <p>"<code>WebDriver:PerformActions</code>" for <kbd>Ctrl</kbd> + <code>Click</code> synthesizes a {{event("contextmenu")}} event ({{bug(1421323)}})</p>
+ </li>
+</ul>
+
+<h4 id="API_changes">API changes</h4>
+
+<ul>
+ <li>Removed obsolete endpoints including "<code>getWindowPosition</code>", "<code>setWindowPosition</code>", "<code>getWindowSize</code>", and "<code>setWindowSize</code>" ({{bug(1348145)}})</li>
+ <li>WebDriver commands which return success with data "<code>null</code>" now return an empty dictionary ({{bug(1461463)}})</li>
+</ul>
+
+<h4 id="Bug_fixes">Bug fixes</h4>
+
+<ul>
+ <li>
+  <p>"<code>WebDriver:ExecuteScript</code>" caused cyclic reference error for <a href="/en-US/docs/Web/WebDriver/WebElement">WebElement</a> collections ({{bug(1447977)}})</p>
+ </li>
+ <li>
+  <p>Dispatching a "<code>pointerMove</code>" or "<code>pause</code>" action primitive could cause a hang, and the command to never send a reply ({{bug(1467743)}}, {{bug(1447449)}})</p>
+
+  <p> </p>
+ </li>
+</ul>
+
+<h3 id="Other">Other</h3>
+
+<p><em>No changes.</em></p>
+
+<h2 id="Changes_for_add-on_developers">Changes for add-on developers</h2>
+
+<h3 id="API_changes_2">API changes</h3>
+
+<ul>
+ <li>Added the {{WebExtAPIRef("webRequest.getSecurityInfo()")}} API to examine details of TLS connections ({{bug(1322748)}}).</li>
+ <li>Added the {{WebExtAPIRef("browserSettings.newTabPosition")}} to customize where new tabs open ({{bug(1344749)}}).</li>
+ <li><code>windowTypes</code> has been deprecated in {{WebExtAPIRef("windows.get()")}}, {{WebExtAPIRef("windows.getCurrent()")}}, and {{WebExtAPIRef("windows.getLastFocused()")}} ({{bug(1419132)}}).</li>
+ <li>It's now possible to modify a browser action on a per-window basis ({{bug(1419893)}}).</li>
+</ul>
+
+<h3 id="Manifest_changes">Manifest changes</h3>
+
+<ul>
+ <li>New <code>open_at_install</code> property of the <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/sidebar_action">sidebar_action</a></code> manifest key enables extensions to control whether their sidebars should open automatically on install or not ({{bug(1460910)}}).</li>
+ <li>Changes to the <code>browser_style</code> property of various manifest keys:
+  <ul>
+   <li>In <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/page_action">page_action</a></code> and <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/browser_action">browser_action</a></code> it defaults to <code>false</code>.</li>
+   <li>In <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/sidebar_action">sidebar_action</a></code> and <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/options_ui">options_ui</a></code> it defaults to <code>true</code>.</li>
+  </ul>
+ </li>
+</ul>
+
+<h3 id="Theme_changes">Theme changes</h3>
+
+<ul>
+ <li>New <code>tab_background_separator</code> property of the <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/theme">theme</a></code> manifest key enables extensions to change the color of the tab separator ({{bug(1459455)}}).</li>
+</ul>
+
+<h3 id="Removals_6">Removals</h3>
+
+<ul>
+ <li>Support for unpacked sideloaded extensions has been removed ({{bug(1385057)}}).</li>
+ <li>The warning about <code>browser_style</code> displayed when temporarily loading an extension for testing is no longer displayed ({{bug(1404724)}}).</li>
+</ul>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="https://www.fxsitecompat.com/en-US/versions/62">Site compatibility for Firefox 62</a></li>
+</ul>
+
+<h2 id="Older_versions">Older versions</h2>
+
+<p>{{Firefox_for_developers(61)}}</p>
diff --git a/files/es/mozilla/firefox/releases/63/index.html b/files/es/mozilla/firefox/releases/63/index.html
new file mode 100644
index 0000000000..cd63bb1eac
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/63/index.html
@@ -0,0 +1,274 @@
+---
+title: Firefox 63 para desarrolladores
+slug: Mozilla/Firefox/Releases/63
+tags:
+  - Firefox
+  - Mozilla
+  - Release
+translation_of: Mozilla/Firefox/Releases/63
+---
+<div>{{FirefoxSidebar}}</div>
+
+<p class="summary">Este articulo proporciona información sobre los cambios en Firefox 63, que afectara a los desarrolladores. La versión de Firefox 63 fue publicada el 23 de octubre del 2018.</p>
+
+<h2 id="Cambios_para_los_desarrolladores_web">Cambios para los desarrolladores web</h2>
+
+<h3 id="Herramientas_de_desarrollo">Herramientas de desarrollo</h3>
+
+<ul>
+ <li>La pestaña de fuentes en el <a href="/en-US/docs/Tools/Page_Inspector">Inspector de Pagina</a> ahora incluye un editor que facilita ver y editar los ajustes de fuente en tu página. ver <a href="/en-US/docs/Tools/Page_Inspector/How_to/Edit_fonts">editar fuentes </a>para más detalles.</li>
+ <li>El <a href="/en-US/docs/Tools/Accessibility_inspector">Inspector de accesibilidad</a> ahora está habilitado por defecto. ({{bug(1482454)}}).</li>
+ <li>Cuando flotas sobre un objeto en el <a href="/en-US/docs/Tools/Accessibility_inspector">Inspector de accesibilidad</a>, <a href="/en-US/docs/Tools/Accessibility_inspector#Highlighting_of_UI_items">el objeto es resaltado </a>y su rol y nombre serán mostrados en una barra de información de la página.  ({{bug(1473030)}}).</li>
+ <li>La consola de comandos en la <a href="/en-US/docs/Tools/Web_Console">Consola Web</a> es ahora mostrada inmediatamente con su respectivo resultado. ({{bug(1136299)}}).</li>
+ <li>Un nuevo icono ha sido añadido al contenido <a href="/en-US/docs/Tools/Network_Monitor">Monitor de Red</a> para indicar cuando una URL pertenece a un rastreador desconocido — ver <a href="/en-US/docs/Tools/Network_Monitor/request_list#Security_icons">iconos de seguridad.</a> ({{bug(1333994)}}).</li>
+ <li>El valor por defecto de    <code>devtools.aboutdebugging.showSystemAddons</code> es ahora <code>false</code>, significa que los complementos del sistema no serán listados en el <code>about:debugging</code> página. Puedes cambiar los ajustes navegando en <code>about:config</code> ({{bug(1425347)}}).</li>
+ <li>la barra de tareas <a href="/en-US/docs/Tools/Responsive_Design_Mode">Modo de diseño responsivo</a> fue simplificada, y añadimos la opción de alinear a la izquierda left-align la ventanilla.</li>
+ <li>El inspector de página incluye un <a href="/en-US/docs/Tools/Page_Inspector/How_to/Examine_and_edit_HTML#Custom_element_definition">enlace a la definición de clases</a> para un elemento personalizado. ({{bug(1443923)}}).</li>
+</ul>
+
+<h3 id="HTML">HTML</h3>
+
+<ul>
+ <li>Soporte para los {{HTMLElement("img")}} elementos <code>decoding</code> el atributo ha sido añadido ({{bug(1416328)}}); ver tambien {{DOMxRef("HTMLImageElement.decoding")}}.</li>
+</ul>
+
+<h4 id="Removals">Removals</h4>
+
+<ul>
+ <li>Soporte para la <code>sidebar</code> (barralateral) tipo de enlace (<code>rel="sidebar"</code>) ha sido removido. si una etiqueta de anclaje incluye este atributo, sera ignorado. ({{bug(1452645)}}).</li>
+</ul>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li>Soporte para {{CSSxRef(":defined")}} pseudo-clase ha sido añadida ({{bug(1331334)}}).</li>
+ <li>soporte para {{CSSxRef("row-gap")}}, {{CSSxRef("column-gap")}} y {{CSSxRef("gap")}} ha sido añadida en <a href="/en-US/docs/Web/CSS/CSS_Box_Alignment/Box_Alignment_in_Flexbox#The_gap_properties">diseño flexbox</a> ({{bug(1398483)}}).</li>
+ <li>Soporte reactivado para <a href="/en-US/docs/Web/CSS/@media/-webkit-device-pixel-ratio">webkit-prefixed pixel-density @media queries</a> ({{bug(1444139)}}).</li>
+ <li>Soporte añadido para <a href="/en-US/docs/Web/CSS/CSS_Flexible_Box_Layout">CSS Caja de diseño flexible</a> (Flexbox) propiedades {{CSSxRef("align-self")}}, {{CSSxRef("align-content")}}, y {{CSSxRef("align-items")}} también como {{CSSxRef("justify-content")}} propiedad ({{bug(1472843)}}).</li>
+ <li>implementado el path()función para {{CSSxRef("offset-path")}} ({{bug(1429298)}}).</li>
+ <li>Implementado <a href="/en-US/docs/Web/CSS/Media_Queries/Using_media_queries#Syntax_improvements_in_Level_4">mejoras en la sintaxis de la petición de medios nivel 4</a> ({{bug(1472843)}}).</li>
+ <li>Cambio de nombre offset-* propiedades a {{CSSxRef("inset-block-start")}}, {{CSSxRef("inset-block-end")}}, {{CSSxRef("inset-inline-start")}}, and {{CSSxRef("inset-inline-end")}} ({{bug(1464782)}}).</li>
+ <li>Adiciona soporte para <a href="/en-US/docs/Web/CSS/@media/prefers-reduced-motion">preferencia-movimiento-reducido</a> implementación contenido media. ({{bug(1365045)}}, {{bug(1475462)}}).</li>
+ <li>Added flow relative values (<code>block</code>, <code>inline</code>) for the {{CSSxRef("resize")}} property ({{bug(1464786)}}).</li>
+ <li>Implemented flexbox layout for <code>safe</code> &amp; <code>unsafe</code> values in {{CSSxRef("align-self")}}, {{CSSxRef("align-content")}}, and {{CSSxRef("justify-content")}} ({{bug(1297774)}}).</li>
+ <li>The <a href="/en-US/docs/Web/CSS/CSS_Logical_Properties">logical properties</a> (where appropriate) are now animatable ({{bug(1309752)}}).</li>
+</ul>
+
+<h4 id="Removals_2">Removals</h4>
+
+<ul>
+ <li>Removed <code>offset-block-start</code>, <code>offset-block-end</code>, <code>offset-inline-start</code> and <code>offset-inline-end</code>; these have been renamed to <code>inset-*</code>, as described above ({{bug(1464782)}}).</li>
+</ul>
+
+<h3 id="SVG">SVG</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<ul>
+ <li>The {{JSxRef("Symbol.prototype.description")}} property has been implemented ({{bug(1472170)}}).</li>
+ <li>The {{JSxRef("Object.fromEntries()")}} method has been added ({{bug(1469019)}}).</li>
+ <li>When you try to access a property of an undefined object, the error message is now much improved. Considering the case where <code>x</code> is undefined and you try to access <code>x.y</code>, instead of <code>TypeError: x is undefined</code> the console now returns the more descriptive <code><a href="/en-US/docs/Web/JavaScript/Reference/Errors/cant_access_property">x is undefined; can't access its "y" property</a></code> ({{bug(1259822)}}).</li>
+</ul>
+
+<h4 id="Removals_3">Removals</h4>
+
+<ul>
+ <li>Experimental WebAssembly Module IndexedDB serialization support has been removed ({{bug(1469395)}}).</li>
+</ul>
+
+<h3 id="APIs">APIs</h3>
+
+<h4 id="New_APIs">New APIs</h4>
+
+<ul>
+ <li>The Shadow DOM ({{bug(1471947)}}) and Custom Elements ({{bug(1471948)}}) APIs have been enabled by default; See <a href="/en-US/docs/Web/Web_Components">Web components</a> for more details.</li>
+ <li>The {{domxref("Media_Capabilities_API", "Media Capabilities API", "", "1")}} been implemented ({{bug(1409664)}}).</li>
+ <li>The {{domxref("Clipboard", "Async Clipboard API", "", "1")}} has been implemented and enabled by default for all channels ({{bug(1461465)}}). As is the case with Chrome, Firefox currently implements only the {{domxref("Clipboard.writeText", "writeText()")}} and {{domxref("Clipboard.readText", "readText()")}} methods; however, unlike Chrome, <code>readText()</code> is only available in <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions">browser extensions</a>.</li>
+ <li>The {{DOMxRef("SecurityPolicyViolationEvent")}} interface is now supported. It allows sending events when the {{HTTPHeader("Content-Security-Policy")}} is violated ({{bug(1472661)}}).</li>
+</ul>
+
+<h4 id="DOM">DOM</h4>
+
+<ul>
+ <li>The following portions of the {{domxref("Web_Animations_API", "Web Animations API", "", "1")}} have been enabled by default (see {{bug(1476158)}}):
+  <ul>
+   <li>The {{DOMxRef("Animation")}} properties {{DOMxRef("Animation.ready", "ready")}} and {{DOMxRef("Animation.finished", "finished")}}, specifying the <code>Animation</code> object's <code>ready</code> and <code>finished</code> {{JSxRef("Promise")}}s.</li>
+   <li>The {{DOMxRef("Animation")}} object's {{DOMxRef("Animation.effect", "effect")}} property.</li>
+   <li>The interfaces {{DOMxRef("KeyframeEffect")}} and {{DOMxRef("AnimationEffect")}}.</li>
+  </ul>
+ </li>
+ <li>The {{DOMxRef("Element.toggleAttribute()")}} method has been implemented ({{bug(1469592)}}).</li>
+ <li>The historical, previously non-standard, {{DOMxRef("Event.returnValue")}} property is now supported for compatibility purposes ({{bug(1452569)}}).</li>
+ <li>We implemented the {{DOMxRef("Window.event")}} property to improve web compatibility, now that it's become standard ({{bug(218415)}}).</li>
+ <li>To bring Firefox into alignment with Edge and Chrome, the {{DOMxRef("NavigatorID.platform", "navigator.platform")}} property now returns <code>"Win32"</code> even when running on 64-bit Windows ({{bug(1472618)}}).</li>
+ <li>Prior to Firefox 63, links that open new windows that had <code>rel="noopener"</code>, as well as calls to {{DOMxRef("Window.open()")}} with the <code><a href="/en-US/docs/Web/API/Window/open#noopener">noopener</a></code> window feature enabled would default to having all window features disabled, so that you had to explicitly re-enable any standard features you wanted. Now these windows have the same set of features enabled as any other window, and you need to explicitly turn off any you don't want ({{bug(1419960)}}).</li>
+</ul>
+
+<h4 id="DOM_events">DOM events</h4>
+
+<ul>
+ <li>Handling of the <kbd>Alt</kbd> key <em>on the right side</em> of the keyboard has been improved on Windows. If the user's current keyboard layout maps the <kbd>Alt</kbd> key to the <kbd>AltGr</kbd> modifier key, the value of {{DOMxRef("KeyboardEvent.key")}} is now reported as <code>"AltGraph"</code>. This behavior matches the behavior recently introduced in Chrome ({{bug(900750)}}).</li>
+</ul>
+
+<h4 id="Media_Web_Audio_and_WebRTC">Media, Web Audio, and WebRTC</h4>
+
+<ul>
+ <li>Microphone access now works simultaneously in multiple tabs, even within the same content process ({{bug(1404977)}}).</li>
+ <li>{{DOMxRef("RTCDataChannel")}} has been updated to support the sctp-sdp-21 data format for the data, in addition to the older sctp-sdp-05 format previously supported.</li>
+ <li>The {{DOMxRef("ConstantSourceNode")}} node type for Web Audio API now has a default channel count of 2 rather than 1, in order to match the specification ({{bug(1413283)}}).</li>
+ <li>The {{domxref("Web_Audio_API", "Web Audio API", "", "1")}} interface {{DOMxRef("AudioScheduledSourceNode")}} (and by extension, all the other node types based on it) now throw the correct exception when a negative value is specified for the node start time. That error is <code>RangeError</code> ({{bug(1413284)}}).</li>
+ <li>The minimum and maximum permitted values for an {{DOMxRef("AudioParam")}} object's {{DOMxRef("AudioParam.value", "value")}} have been changed to the minimum negative single-precision floating-point value (-340,282,346,638,528,859,811,704,183,484,516,925,440) and the maximum positive single-precision floating-point value (+340,282,346,638,528,859,811,704,183,484,516,925,440) respectively ({{bug(1476695)}}).</li>
+ <li>The {{DOMxRef("SourceBuffer.changeType")}} method, which allows you to change codecs during an active stream, has been enabled by default. This is part of the {{domxref("Media_Source_Extensions_API", "Media Source Extensions API", "", "1")}} ({{bug(1481166)}}).</li>
+ <li>The {{DOMxRef("AudioParam.setValueCurveAtTime()")}} method has been updated to correctly accept an array of floating-point values to indicate the parameter's values to change to over time. Previously, it required a {{DOMxRef("Float32Array")}} ({{bug(1421091)}}).</li>
+ <li>{{DOMxRef("AudioParam.setValueCurveAtTime()")}} has also been updated to correctly return a proper <code>TypeError</code> when a non-finite value is found in the <code>values</code> array ({{bug(1472095)}}).</li>
+ <li>In addition, <code>setValueCurveAtTime()</code> has been updated to ensure that, when the parameter finishes following the specified value curve after the duration elapses, the value of the parameter is set to the last value in the list of values to curve through ({{bug(1308436)}}).</li>
+ <li>The <code>RTCRTPStreamStats</code> dictionary has been renamed to {{DOMxRef("RTCRtpStreamStats")}} for consistency with other WebRTC dictionaries and the specification ({{bug(1480498)}}).</li>
+ <li>Support for the <code>RTCRtpStreamStats</code> dictionary's {{DOMxRef("RTCRtpStreamStats.kind", "kind")}} property has been added ({{bug(1481851)}}).</li>
+ <li>The {{DOMxRef("RTCRtpStreamStats")}} dictionary's {{DOMxRef("RTCRtpStreamStats.isRemote", "isRemote")}} property is deprecated and will be removed in Firefox 65. A warning is now output to console when this property is accessed. See <a href="https://blog.mozilla.org/webrtc/getstats-isremote-65/">this blog post on the Advancing WebRTC blog</a> for details ({{bug(1393306)}}).</li>
+</ul>
+
+<h4 id="Canvas_and_WebGL">Canvas and WebGL</h4>
+
+<ul>
+ <li>A new <code>powerPreference</code> context attribute has been added to {{DOMxRef("HTMLCanvasElement.getContext()")}}. On macOS this allows WebGL non-performance-critical applications and applets to request the low-power GPU instead of the high-power GPU in multi-GPU systems ({{bug(1349799)}}).</li>
+</ul>
+
+<h4 id="Removals_4">Removals</h4>
+
+<ul>
+ <li>The obsolete and non-standard Firefox-only methods {{DOMxRef("Window.back()")}} and {{DOMxRef("Window.forward()")}} have been removed. Please use the {{DOMxRef("History.back", "window.history.back()")}} and {{DOMxRef("History.forward", "window.history.forward()")}} methods instead ({{bug(1479486)}}).</li>
+ <li>The {{DOMxRef("URL.createObjectURL", "createObjectURL()")}} and {{DOMxRef("URL.revokeObjectURL", "revokeObjectURL()")}} methods are no longer available on {{DOMxRef("ServiceWorker")}} instances due to the potential they introduced for memory leaks to occur ({{bug(1264182)}}).</li>
+ <li>Since it was deprecated in the specification anyway, the limited support for Doppler effects on {{DOMxRef("PannerNode")}} has been removed from the Web Audio API. The {{DOMxRef("AudioListener")}} properties {{DOMxRef("AudioListener.dopplerFactor", "dopplerFactor")}} and {{DOMxRef("AudioListener.speedOfSound", "speedOfSound")}} have been removed, along with the <code>PannerNode</code> method {{DOMxRef("PannerNode.setVelocity", "setVelocity()")}} ({{bug(1148354)}}).</li>
+</ul>
+
+<h3 id="CSSOM">CSSOM</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="HTTP">HTTP</h3>
+
+<ul>
+ <li>The {{HTTPHeader("Clear-Site-Data")}} header is implemented and no longer behind a preference ({{bug(1470111)}}).</li>
+</ul>
+
+<h3 id="Security">Security</h3>
+
+<ul>
+ <li>Site favicons are now subject to <a href="/en-US/docs/Web/HTTP/CSP">Content Security Policy</a>, if one is configured for the site ({{bug(1297156)}}).</li>
+ <li>CSP <code>script-src</code> directive's <code>'report-sample'</code> expression now recognized when generating violation reports. This directive indicates that a short sample of where the violation occurred should be included in the report. Previously, Firefox always included this sample ({{bug(1473218)}}).</li>
+ <li>Firefox now uses NSS 3.39 ({{bug(1470914)}}).</li>
+</ul>
+
+<h3 id="Plugins">Plugins</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="WebDriver_conformance_(Marionette)">WebDriver conformance (Marionette)</h3>
+
+<h4 id="New_features">New features</h4>
+
+<ul>
+ <li>Marionette now returns a <code>setWindowRect</code> <a href="/en-US/docs/Web/WebDriver/Capabilities">capability</a> in the <code>WebDriver:NewSession</code> response that is true if the browser window can be repositioned and resized, which e.g. is the case for Firefox but not any mobile applications ({{bug(1470659)}}).</li>
+ <li>Added support for the <code>unhandledPromptBehavior</code> capability, which allows to define a specific <a href="https://w3c.github.io/webdriver/#dfn-user-prompt-handler">prompt behavior</a> of the WebDriver specification ({{bug(1264259)}}).</li>
+ <li>Handling of user prompts has been added to the <code>WebDriver:ExecuteScript</code> and <code>WebDriver:ExecuteAsyncScript</code> commands ({{bug(1439995)}}).</li>
+</ul>
+
+<h4 id="API_changes">API changes</h4>
+
+<ul>
+ <li>Deprecated command end-points without the <code>WebDriver:</code> prefix have been removed ({{bug(1451725)}}).</li>
+ <li>The <code>WebDriver:NewSession</code> command returns recommended strings (<code>linux</code>, <code>mac</code>, <code>windows</code>) for <code>platformName</code> as defined in the WebDriver specification ({{bug(1470646)}}).</li>
+</ul>
+
+<h4 id="Bug_fixes">Bug fixes</h4>
+
+<ul>
+ <li>Focus related events were missing on element interaction when Firefox was not running as the top-most application ({{bug(1398111)}}).</li>
+ <li>Performing a <code>pointerDown</code> and <code>pointerUp</code> action in a subsequent action sequence could trigger a double click because <code>WebDriver:ReleaseActions</code> didn't reset the double click tracker ({{bug(1422583)}}).</li>
+ <li>Executing <code>pause</code> actions repeatedly could cause an infinite hang ({{bug(1447449)}}).</li>
+ <li>Fixed a bug where returning an element collection from <code>WebDriver:ExecuteScript</code> and <code>WebDriver:ExecuteAsyncScript</code> would cause a cyclic reference error ({{bug(1447977)}}).</li>
+ <li>To prevent a race condition both the <code>WebDriver:AcceptAlert</code> and <code>WebDriver:DismissAlert</code> commands now wait until the user prompt has been closed ({{bug(1479368)}}).</li>
+ <li>Log entries as emitted by the frame script were no longer limited by <code>MarionettePrefs.logLevel</code> but logged everything ({{bug(1482829)}}).</li>
+ <li><code>WebDriver:TakeScreenshot</code> raised an error when taking a screenshot of a window larger than 32767 pixels in width or height ({{bug(1485730)}}).</li>
+ <li><code>WebDriver:SendAlertText</code> didn't replace default user prompt value if text to send is an empty string ({{bug(1486485)}}).</li>
+</ul>
+
+<h3 id="Other">Other</h3>
+
+<ul>
+ <li>Corrected the behavior of {{DOMxRef("PerformanceObserver.observe()")}} to simply do nothing if no valid entry types are found in the specified array of entry types to observe, or if the array is empty or missing. Previously, Firefox was incorrectly throwing a <code>TypeError</code> ({{bug(1403027)}}).</li>
+ <li>In <a href="/en-US/docs/Web/OpenSearch">OpenSearch</a>, Firefox now accepts <code>application/json</code> as a search URL type, as an alias of <code>application/x-suggestions+json</code> ({{bug(1425827)}}).</li>
+</ul>
+
+<h2 id="Changes_for_add-on_developers">Changes for add-on developers</h2>
+
+<h3 id="API_changes_2">API changes</h3>
+
+<h4 id="Theming">Theming</h4>
+
+<ul>
+ <li>The default text color for {{WebExtAPIRef("browserAction")}} badges is now automatically set to black or white, to maximise contrast with the background ({{bug(1474110)}}).</li>
+ <li>The <code>accentcolor</code> and <code>textcolor</code> properties of the <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/theme">theme</a></code> manifest key are now optional ({{bug(1413144)}}).</li>
+ <li>{{WebExtAPIRef("browserAction.getBadgeTextColor()")}} and {{WebExtAPIRef("browserAction.setBadgeTextColor()")}} enable you to get and set the text color of browser action badges ({{bug(1424620)}}).</li>
+ <li>The theme <code>colors</code> key in <code>manifest.json</code> now supports the <code>ntp_text</code> property to set the text color in a new tab, and the <code>ntp_background</code> property to set the color of a new tab ({{bug(1347204)}}).</li>
+ <li>Themes can now define the colors for sidebars, such as the bookmarks sidebar ({{bug(1418602)}}). The relevant properties include:
+  <ul>
+   <li><code>sidebar</code>: The background color for sidebars.</li>
+   <li><code>sidebar_text</code>: The text color for sidebars.</li>
+   <li><code>sidebar_highlight</code>: The background color of a selected item in a sidebar.</li>
+   <li><code>sidebar_highlight_text</code>: The text color of a selected item in a sidebar.</li>
+  </ul>
+ </li>
+ <li>The method {{WebExtAPIRef("management.install()")}} allows web extensions to install and enable signed browser themes ({{bug(1369209)}}).</li>
+</ul>
+
+<h4 id="Search">Search</h4>
+
+<ul>
+ <li>The new {{WebExtAPIRef("search")}} AP<a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/search">I</a> enables you to retrieve the list of installed search engines and perform searches with them ({{bug(1352598)}}).</li>
+ <li>{{WebExtAPIRef("topSites.get()")}} now takes an <code>options</code> parameter enabling you to set various options for the list of sites returned ({{bug(1445836)}}).</li>
+</ul>
+
+<h4 id="Tabs">Tabs</h4>
+
+<ul>
+ <li>{{WebExtAPIRef("tabs.onHighlighted")}} now supports multi-select ({{bug(1474440)}}).</li>
+ <li>{{WebExtAPIRef("tabs.highlight")}} includes an optional field in the <code>highlightInfo</code> object. The optional populate field defaults to <code>true</code>. Setting it to <code>false</code> prevents the returned <code>windows.Window</code> object from being populated with a list of tabs.</li>
+ <li>{{WebExtAPIRef("tabs.update")}} now supports changing the selection status of a tab by including <code>highlighted: true</code> in the <code>updateProperties</code> parameter ({{bug(1479129)}}).</li>
+ <li>{{WebExtAPIRef("tabs.update")}} supports changing the selection status of a tab without changing the focused tab ({{bug(1486050)}}) by including both <code>highlighted: true</code> and <code>active: false</code> in the <code>updateProperties</code> parameter.</li>
+ <li>{{WebExtAPIRef("tabs.query")}} now returns an array of {{WebExtAPIRef("tabs.Tab")}} objects if multiple tabs are selected ({{bug(1465170)}}).</li>
+ <li>The {{WebExtAPIRef("tabs.Tab")}} property now properly reflects which tabs in a browser window are selected (highlighted) and {{WebExtAPIRef("tabs.highlight")}} supports changing the highlighted status of multiple tabs ({{bug(1464862)}}).</li>
+ <li>The <code>isarticle</code> property in the <code>extraParameters</code> object passed into {{WebExtAPIRef("tabs.onUpdated")}} has been renamed to <code>isArticle</code>. The old name is retained but deprecated. This change was uplifted to Firefox 62 ({{bug(1461695)}}).</li>
+ <li>The {{WebExtAPIRef('tabs.onUpdated')}} event can be used to track when a tab is drawing the user's attention with <code>attention</code> property of the <code>changeInfo</code> object ({{bug(1396684)}}).</li>
+</ul>
+
+<h4 id="Menus">Menus</h4>
+
+<ul>
+ <li>Added {{WebExtApiRef("menus.getTargetElement()")}} to the {{WebExtApiRef("menus")}} API. The method returns the clicked on element referenced by the <code>targetElementId</code> parameter ({{bug(1325814)}}).</li>
+ <li>{{WebExtAPIRef("menus.create()")}} now enables you to create invisible menu items, and {{WebExtAPIRef("menus.update()")}} enables you to toggle menu item visibility ({{bug(1482529)}}).</li>
+ <li>Items created using the {{WebExtAPIRef("menus")}} API now support access keys ({{bug(1320462)}}).</li>
+ <li>The <code>targetUrlPatterns</code> parameter of {{WebExtApiRef("menus.create()")}} and {{WebExtApiRef("menus.update()")}} now supports any URL scheme, even those that are usually not allowed in a match pattern ({{bug(1280370)}}).</li>
+</ul>
+
+<h4 id="Other_2">Other</h4>
+
+<ul>
+ <li>{{WebExtAPIRef("commands.onCommand")}} is now treated as <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/User_actions">user input</a> ({{bug(1408129)}}).</li>
+ <li>The {{WebExtAPIRef("webRequest")}} API now enables you to filter for speculative connections ({{bug(1479565)}}).</li>
+ <li>{{WebExtAPIRef("webRequest.SecurityInfo")}} adds two new properties, <code>keaGroupName</code> and <code>signatureSchemeName</code>. This change was uplifted to Firefox 62 ({{bug(1471959)}}).</li>
+ <li>{{WebExtAPIRef("cookies.Cookie")}} now includes a property indicating the SameSite state of the cookie. The {{WebExtAPIRef("cookies.SameSiteStatus")}} enumeration defines SameSite state values ({{bug(1351663)}}).</li>
+ <li>Match patterns for URLs now explicitly match the "data" URL scheme ({{bug(1280370)}}).</li>
+</ul>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="https://www.fxsitecompat.com/en-CA/versions/63/">Site compatibility for Firefox 63</a></li>
+</ul>
+
+<h2 id="Older_versions">Older versions</h2>
+
+<p>{{Firefox_for_developers(62)}}</p>
diff --git a/files/es/mozilla/firefox/releases/66/index.html b/files/es/mozilla/firefox/releases/66/index.html
new file mode 100644
index 0000000000..1231c4e85a
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/66/index.html
@@ -0,0 +1,162 @@
+---
+title: Firefox 66 para desarrolladores
+slug: Mozilla/Firefox/Releases/66
+tags:
+  - '66'
+  - Firefox
+  - Lanzamiento
+  - Mozilla
+translation_of: Mozilla/Firefox/Releases/66
+---
+<div>{{FirefoxSidebar}}</div>
+
+<p class="summary"><font>Este artículo proporciona información sobre los cambios en Firefox 66 que afectarán a los desarrolladores.<span> </span></font><font>Firefox 66 fue lanzado el 19 de marzo de 2019.</font></p>
+
+<h2 id="Cambios_para_desarrolladores_web" style='margin: 103px 0px 20px; padding: 0px; border: 0px; font-size: 2.33333rem; font-family: x-locale-heading-primary, zillaslab, Palatino, "Palatino Linotype", x-locale-heading-secondary, serif; line-height: 1.2; position: relative; color: rgb(51, 51, 51); font-style: normal; letter-spacing: -0.04448px; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-style: initial;'><font><font>Cambios para desarrolladores web</font></font></h2>
+
+<h3 id="Herramientas_de_desarrollo">Herramientas de desarrollo</h3>
+
+<ul>
+ <li><font><font>Los captadores de JavaScript ahora pueden ejecutarse desde la ventana emergente de autocompletado en la<span> </span></font></font> <a href="https://developer.mozilla.org/en-US/docs/Tools/Web_Console">Consola Web</a>  ({{bug(1499289)}}).</li>
+ <li><span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">Los métodos de la ventana</span> {{domxref("Window.alert()", "alert()")}}, {{domxref("Window.prompt()","prompt()")}}, and {{domxref("Window.confirm()","confirm()")}} ahora trabajan de nuevo en el <a href="https://developer.mozilla.org/en-US/docs/Tools/Responsive_Design_Mode">Modo de diseño de respuesta</a>, <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">después de un período de ruptura </span>({{bug(1273997)}}).</li>
+ <li style="margin: 0px 0px 6px; padding: 0px; border: 0px;"><font><font>Puede copiar la salida de la consola al portapapeles haciendo clic derecho y seleccionando "</font></font><strong style="border: 0px; margin: 0px; padding: 0px;"><font><font>Exportar mensajes visibles al portapapeles</font></font></strong><font><font>" en el menú contextual.</font></font></li>
+</ul>
+
+<h3 id="HTML">HTML</h3>
+
+<ul>
+ <li><font><font>Los archivos HTML (y texto sin formato)<span> </span></font><font>codificados en UTF-8 que se<span> </span></font><font>cargan desde las<span> </span></font></font><code style='margin: 0px; padding: 0px 2px; border: 0px; font-style: normal; font-weight: 400; background-color: rgba(220, 220, 220, 0.5); border-radius: 2px; font-family: consolas, "Liberation Mono", courier, monospace; color: rgb(51, 51, 51); font-size: 16px; letter-spacing: -0.04448px; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; text-decoration-style: initial;'>file:</code><font><font>URL ahora son compatibles sin<span> </span></font></font><code style='margin: 0px; padding: 0px 2px; border: 0px; font-style: normal; font-weight: 400; background-color: rgba(220, 220, 220, 0.5); border-radius: 2px; font-family: consolas, "Liberation Mono", courier, monospace; color: rgb(51, 51, 51); font-size: 16px; letter-spacing: -0.04448px; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; text-decoration-style: initial;'>&lt;meta charset="utf-8"&gt; </code><font><font>la lista de materiales UTF-8 BOM, lo que facilita el trabajo local en dichos archivos antes de cargarlos en un servidor.<span> </span></font><font>Aún debe asegurarse de que el servidor envíe<span> </span></font></font><code style='margin: 0px; padding: 0px 2px; border: 0px; font-style: normal; font-weight: 400; background-color: rgba(220, 220, 220, 0.5); border-radius: 2px; font-family: consolas, "Liberation Mono", courier, monospace; color: rgb(51, 51, 51); font-size: 16px; letter-spacing: -0.04448px; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; text-decoration-style: initial;'>charset=utf-8</code><font><font> en el<span> </span></font></font><code style='margin: 0px; padding: 0px 2px; border: 0px; font-style: normal; font-weight: 400; background-color: rgba(220, 220, 220, 0.5); border-radius: 2px; font-family: consolas, "Liberation Mono", courier, monospace; color: rgb(51, 51, 51); font-size: 16px; letter-spacing: -0.04448px; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; text-decoration-style: initial;'>Content-Type</code><font><font> encabezado HTTP para dichos archivos, de lo contrario, el mecanismo de detección utilizado para los archivos locales interrumpiría la carga incremental en el caso de la red<span> </span></font></font> ({{bug(1071816)}}).</li>
+</ul>
+
+<h4 id="Removido" style='margin: 30px 0px 20px; padding: 0px; border: 0px; font-size: 1.33333rem; font-family: x-locale-heading-primary, zillaslab, Palatino, "Palatino Linotype", x-locale-heading-secondary, serif; line-height: 1.2; color: rgb(51, 51, 51); font-style: normal; letter-spacing: -0.04448px; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-style: initial;'><font><font>Removido</font></font></h4>
+
+<ul>
+ <li>El <code>x-moz-errormessage</code> <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">atributo se ha eliminado del</span> {{HTMLElement("input")}} elemento ({{bug(1513890)}}). Debe usar  {{domxref("Constraint_validation", "Funciones de validación de restricciones", "", "1")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">para implementar mensajes de validación personalizados en su luga</span>r.</li>
+</ul>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li><a href="https://drafts.csswg.org/css-scroll-anchoring/">El Anclaje de desplazamiento</a> <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">se ha implementado en Firefox Desktop (pero todavía no en dispositivos móviles), que incluye la</span> {{cssxref("overflow-anchor")}} propiedad ({{bug(1305957)}}).</li>
+ <li><font>Hemos implementado el<span> </span></font><font>modificador de</font> <a href="/en-US/docs/Web/CSS/Attribute_selectors">selector de atributo</a> que distingue entre  <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">mayúsculas y minúsculas</span>, <code>s</code> ({{Bug(1512386)}}).</li>
+ <li>Varias <a href="/en-US/docs/Web/CSS/CSS_Logical_Properties">propiedades logicas</a><font><font> abreviadas</font><font><span> </span>han aterrizado, junto con las propiedades del radio del borde relativo al flujo:</font></font>
+  <ul>
+   <li>{{cssxref("padding-block")}} y {{cssxref("padding-inline")}} ({{bug(1519847)}}).</li>
+   <li>{{cssxref("margin-block")}} y {{cssxref("margin-inline")}} ({{bug(1519944)}}).</li>
+   <li>{{cssxref("inset")}}, {{cssxref("inset-block")}}, y {{cssxref("inset-inline")}} ({{bug(1520229)}}).</li>
+   <li>{{cssxref("border-block-color")}}, {{cssxref("border-block-style")}}, {{cssxref("border-block-width")}}, {{cssxref("border-inline-color")}}, {{cssxref("border-inline-style")}}, and {{cssxref("border-inline-width")}} ({{bug(1520236)}}).</li>
+   <li>{{cssxref("border-block")}} y {{cssxref("border-inline")}} ({{bug(1520396)}}).</li>
+   <li>{{cssxref("border-start-start-radius")}}, {{cssxref("border-start-end-radius")}}, {{cssxref("border-end-start-radius")}}, y {{cssxref("border-end-end-radius")}} ({{bug(1520684)}}).</li>
+  </ul>
+ </li>
+ <li><font>Implementamos las<span> </span></font><font>consultas</font> {{cssxref("@media/overflow-inline", "overflow-inline")}} y {{cssxref("@media/overflow-block", "overflow-block")}} medios ({{Bug(1422235)}}).</li>
+ <li>{{cssxref("grid-template-columns")}} y {{cssxref("grid-template-rows")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">ahora se pueden animar, según las reglas establecidas en sus especificaciones</span> ({{bug(1348519)}}).</li>
+ <li>Ahora soportamos {{cssxref("calc")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">con porcentajes para celdas de tabla y anchos de columna</span>  ({{bug(957915)}}).</li>
+ <li><font>Las<span> </span></font><font>palabras clave</font> <code>min-content</code> y <code>max-content</code> <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">ahora están disponibles sin prefijo</span> ({{bug(1322780)}}). <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">Estos se pueden establecer en</span>:
+  <ul>
+   <li>{{cssxref("width")}}</li>
+   <li>{{cssxref("height")}}</li>
+   <li>{{cssxref("flex-basis")}}</li>
+   <li>{{cssxref("min-width")}}</li>
+   <li>{{cssxref("max-width")}}</li>
+   <li>{{cssxref("min-height")}}</li>
+   <li>{{cssxref("max-height")}}</li>
+   <li>{{cssxref("min-block-size")}}</li>
+   <li>{{cssxref("min-inline-size")}}</li>
+   <li>{{cssxref("max-block-size")}}</li>
+   <li>{{cssxref("max-inline-size")}}</li>
+   <li>{{cssxref("block-size")}}</li>
+   <li>{{cssxref("inline-size")}}</li>
+  </ul>
+ </li>
+</ul>
+
+<h3 id="SVG">SVG</h3>
+
+<p><em>No hay adicionales.</em></p>
+
+<h4 id="Removido_2">Removido</h4>
+
+<ul>
+ <li>Eliminamos el soporte para <code><a href="/en-US/docs/XML_introduction/xml:base">xml:base</a></code> atributo ({{Bug(903372)}}).</li>
+</ul>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<p><em>Sin cambios.</em></p>
+
+<h3 id="APIs">APIs</h3>
+
+<h4 id="Nuevos_en_APIscambios">Nuevos en APIs/cambios</h4>
+
+<ul>
+ <li><span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">La reproducción automática de audio se bloqueará de forma predeterminada poco después de que la versión 66 se convierta en la versión de lanzamiento de Firefox</span> ({{bug(1487844)}}, <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">consulte el</span>  {{bug(1535667)}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">para obtener información detallada sobre la implementación</span>). <font><span> </span></font><font>La función se extenderá gradualmente a los usuarios hasta que todos la tengan.</font></li>
+</ul>
+
+<h4 id="DOM">DOM</h4>
+
+<ul>
+ <li>El {{domxref("HTMLSlotElement.assignedElements()")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">método ha sido implementado</span> ({{bug(1425685)}}).</li>
+ <li>El {{domxref("TextEncoder.encodeInto()")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">método ha sido implementado</span>  ({{bug(1514664)}}).</li>
+</ul>
+
+<h4 id="Eventos_DOM">Eventos DOM</h4>
+
+<ul>
+ <li>La {{domxref("InputEvent.inputType")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">propiedad ha sido implementada</span>  ({{bug(1447239)}}).</li>
+ <li><font>Las<span> </span></font><font>propiedades</font>  {{domxref("Window.event")}} y  {{domxref("Event.returnValue")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">ropiedades, que originalmente eran propiedad de IE, y que luego se admitían en otros navegadores por motivos de compatibilidad, se han vuelto a introducir en Firefox 66, después de haber sido agregadas primero en las versiones 63 y 64 respectivamente, pero luego se eliminaron nuevamente debido a problemas de compatibilidad.</span></li>
+ <li><span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">A partir de 66, cuando la</span> {{domxref("KeyboardEvent.keyCode")}} propiedad del {{event("keypress")}} evento del objeto es 0, <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">el valor será el mismo que<span> </span></span> {{domxref("KeyboardEvent.charCode")}}. <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">Por el contrario, cuando</span>, <code>charCode</code> es 0, <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">será igual que</span> <code>keyCode</code>. <font><font>Este comportamiento de duplicación coincide con otros navegadores y se espera que solucione la mayoría de los problemas de compatibilidad asociados, sin embargo, la detección de agentes de usuario puede causar problemas adicionales en algunas bibliotecas de JavaScript.<span> </span></font><font>Tenga en cuenta que en términos de especificaciones, hemos cambiado desde el<span> </span></font></font><em><font><font>modelo de división</font></font></em><font><font><span> </span>del<span> </span></font></font><em><font><font>modelo fusionado</font></font></em>  (ver <a href="https://w3c.github.io/uievents/#determine-keypress-keyCode">Como determinar keyCode para eventos de pulsaciones de tecla</a> <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">en la especificación de interfaz de usuario de eventos</span>).</li>
+</ul>
+
+<h4 id="Media_Audio_Web_y_WebRTC">Media, Audio Web, y WebRTC</h4>
+
+<ul>
+ <li>El {{domxref("MediaDevices")}} método {{domxref("MediaDevices.getDisplayMedia", "getDisplayMedia()")}}, <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">disponible como<span> </span></span><code>navigator.mediaDevices.getDisplayMedia()</code>, <font>se ha agregado y sincronizado con la especificación.<span> </span></font><font>Este método le permite capturar una pantalla o parte de una pantalla<span> </span></font>{{domxref("MediaStream")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">para manipularla o compartirla</span> ({{bug(1321221)}}).</li>
+ <li><span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">Como un paso hacia la desaprobación específico de Firefox<span> </span></span> {{domxref("MediaDevices.getUserMedia", "getUserMedia()")}}- <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">método basado para capturar contenido de la pantalla y de la ventana, no la restricción </span><code>mediaSource</code>  <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">estándar, ahora trata los valores</span> <code>screen</code> y  <code>window</code> de forma idéntica. <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">Ambos ahora presentan una lista de pantallas y ventanas para que el usuario pueda elegir</span> ({{bug(1474376)}}).</li>
+ <li>{{domxref("RTCRtpStreamStats.qpSum", "qpSum")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">Se ha agregado a</span> {{domxref("RTCRTPStreamStats")}} <font>objetos de<span> </span></font><font>salida locales</font>. <font>Esto mide el total de los valores de los parámetros de cuantización para cada fotograma enviado o recibido en la pista de video.<span> </span></font><font>Cuanto mayor sea este número, más comprimida estará probablemente la transmisión</font> ({{bug(1347070)}}).</li>
+ <li><span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">En un paso en el camino hacia la implementación del soporte para la Política de funciones en una futura actualización de Firefox</span>, {{domxref("MediaDevices.getUserMedia", "getUserMedia()")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">a no se puede usar en situaciones en las que no hay un origen adecuado para el contenido, como cuando se llama desde un espacio aislado</span> {{HTMLElement("iframe")}} o desde una <code>data</code> URL <font><span> </span>ingresada en el Barra de direcciones por el usuario.<span> </span></font><font>Para obtener más detalles específicos, consulte</font> {{SectionOnPage("/en-US/docs/Web/API/MediaDevices/getUserMedia", "Security")}} ({{bug(1371741)}}).</li>
+</ul>
+
+<h4 id="Removido_3">Removido</h4>
+
+<ul>
+ <li>El legado WebRTC {{domxref("PeerConnection.getStats()")}} <font>método<span> </span></font><font>heredado de WebRTC<span> </span></font><font>se ha eliminado, junto con los tipos asociados</font> ({{bug(1328194)}}).</li>
+</ul>
+
+<h3 id="Redes">Redes</h3>
+
+<ul>
+ <li><span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">El valor predeterminado del</span> {{httpheader("Accept")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">encabezado se ha cambiado a</span> <code>*/*</code> ({{bug(1417463)}}).</li>
+</ul>
+
+<h3 id="Seguridad">Seguridad</h3>
+
+<p><em>Sin cambios.</em></p>
+
+<h3 id="Complementos">Complementos</h3>
+
+<p><em>Sin cambios.</em></p>
+
+<h2 id="Cambios_para_desarrolladores_de_complementos">Cambios para desarrolladores de complementos</h2>
+
+<h3 id="Cambios_en_la_API">Cambios en la API</h3>
+
+<h4 id="Menús">Menús</h4>
+
+<ul>
+ <li><span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">Los elementos del menú de extensión del "marcador"</span> {{WebExtAPIRef("menus.ContextType", "type")}} <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">también aparecerán en la barra lateral de Marcadores</span> (<kbd>Ctrl</kbd> + <kbd>B</kbd>) <span style="background-color: #ffffff; color: #333333; display: inline !important; float: none; font-family: Arial,x-locale-body,sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: -0.04448px; text-align: left; text-decoration-style: initial; text-indent: 0px; text-transform: none; white-space: normal;">y en la ventana de la Biblioteca</span> (<kbd>Ctrl</kbd> + <kbd>Shift</kbd> + <kbd>B</kbd>) ({{bug(1419195)}}).</li>
+</ul>
+
+<h3 id="Cambios_en_Manifesto">Cambios en Manifesto</h3>
+
+<p><em>Sin cambios.</em></p>
+
+<h2 id="Véase_también_la">Véase también la</h2>
+
+<ul>
+ <li><a href="https://www.fxsitecompat.com/en-CA/versions/66/">Compatibilidad del sitio para Firefox 66</a></li>
+</ul>
+
+<h2 id="Versiones_anteriores">Versiones anteriores</h2>
+
+<p>{{Firefox_for_developers(65)}}</p>
diff --git a/files/es/mozilla/firefox/releases/67/index.html b/files/es/mozilla/firefox/releases/67/index.html
new file mode 100644
index 0000000000..a60df8ab8a
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/67/index.html
@@ -0,0 +1,198 @@
+---
+title: Firefox 67 for developers
+slug: Mozilla/Firefox/Releases/67
+tags:
+  - '67'
+  - Firefox
+  - Lanzamiento
+  - Mozilla
+translation_of: Mozilla/Firefox/Releases/67
+---
+<p>{{FirefoxSidebar}}</p>
+
+<p class="summary">Este artículo provee información sobre los cambios en Firefox 67 que afectarán a los desarrolladores. Firefox 67 fue lanzado el 21 de Mayo de 2019.</p>
+
+<h2 id="Cambios_para_desarrolladores_web">Cambios para desarrolladores web</h2>
+
+<h3 id="Herramientas_de_desarrollo">Herramientas de desarrollo</h3>
+
+<ul>
+ <li>Actualizaciones del depurador:
+  <ul>
+   <li><a href="/en-US/docs/Tools/Debugger/How_to/Set_a_breakpoint">Los puntos de interrupción de columna</a> te permiten elegir el punto específico (o columna) en una línea de código donde quieres que el depurador pare ({{bug(1528417)}}).</li>
+   <li><a href="/en-US/docs/Tools/Debugger/Set_a_log_point">Los puntos de registro</a> te permiten registrar información específica a la consola durante la ejecución de código sin pausar la ejecución y sin la necesidad de cambiar el código.</li>
+   <li>The <a href="/en-US/docs/Tools/Debugger/Using_the_Debugger_map_scopes_feature">map scopes feature</a> allows you to view the variables from the original source.</li>
+   <li>You can <a href="/en-US/docs/Tools/Debugger/Debug_worker_threads">debug service worker</a> threads directly in the debugger.</li>
+  </ul>
+ </li>
+ <li><a href="/en-US/docs/Tools/Web_Console">Web Console</a> updates:
+  <ul>
+   <li>Navigate details in the console using the keyboard ({{bug(1424159)}}).</li>
+   <li>Cmd + K will now clear the console of its contents on macOS ({{bug(1532939)}}).</li>
+   <li>When the user clears the console, the error messages cache is cleared as well ({{bug(717611)}}).</li>
+   <li>The user can import existing modules into the current page using import ({{bug(1517546)}}).</li>
+   <li>A new context menu item allows the user to use the <strong>Copy Link Location</strong> command ({{bug(1457111)}}).</li>
+   <li>Clicking a link in the Console causes the same behavior that it would in a content window ({{bug(1466040)}}).</li>
+   <li>Clicking the source link for a code file in the Console panel navigates to the Debugger if debugger knows the file ({{bug(1447244)}}).</li>
+   <li>When the user has filtered the contents of the console, an icon will be added to the filter text box to clear the filter ({{bug(1525821)}}).</li>
+  </ul>
+ </li>
+ <li><a href="/en-US/docs/Tools/Network_Monitor">Network Monitor</a> enhancements:
+  <ul>
+   <li>The <a href="/en-US/docs/Tools/Network_Monitor/request_details#Headers">Header</a> panel of the Network monitor will now display a notification for resources belonging to a known tracker ({{bug(1485416)}}).</li>
+   <li>In the Network monitor <a href="/en-US/docs/Tools/Network_Monitor/request_list#Network_request_columns">request columns</a>, you can control the visible columns and column sorting. The context menu now includes a command to restore the list sort parameters to the default ({{bug(1454962)}}).</li>
+  </ul>
+ </li>
+</ul>
+
+<h4 id="Removals">Removals</h4>
+
+<ul>
+ <li>The following Developer Tools panels have been removed (see <a href="/en-US/docs/Tools/Deprecated_tools">Deprecated tools</a> for details):
+
+  <ul>
+   <li>Canvas debugger ({{bug(1403938)}}).</li>
+   <li>Shader editor ({{bug(1342237)}}).</li>
+   <li>WebAudio editor ({{bug(1403944)}}).</li>
+  </ul>
+ </li>
+ <li>The following Developer Tools have been deprecated (see <a href="/en-US/docs/Tools/Deprecated_tools">Deprecated tools</a> for details):
+  <ul>
+   <li>WebIDE ({{bug(1539462)}}).</li>
+   <li>Connect... page ({{bug(1539462)}}).</li>
+  </ul>
+ </li>
+</ul>
+
+<h3 id="HTML">HTML</h3>
+
+<ul>
+ <li>{{htmlelement("input")}} elements with <code><a href="/en-US/docs/Web/HTML/Attributes/autocomplete">autocomplete</a>="new-password"</code> set on them will no longer have previously saved passwords auto-filled ({{bug(1119063)}}).</li>
+</ul>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li>The {{cssxref("revert")}} keyword has been implemented ({{bug(1215878)}}).</li>
+ <li>The <code>break-word</code> value of the {{cssxref("word-break")}} property is now supported ({{bug(1296042)}}).</li>
+ <li>The <code><a href="/en-US/docs/Web/CSS/@media/prefers-color-scheme">prefers-color-scheme</a></code> media feature is now supported ({{bug(1494034)}}).</li>
+ <li>Custom {{cssxref("cursor")}}s of greater than 32px in size are now disallowed, to mitigate potential malware uses of large cursors ({{bug(1445844)}}).</li>
+</ul>
+
+<h4 id="Removals_2">Removals</h4>
+
+<ul>
+ <li>Use of the proprietary {{cssxref("-moz-binding")}} property is now restricted to chrome and UA-stylesheets ({{bug(1523712)}}).</li>
+</ul>
+
+<h3 id="SVG">SVG</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<ul>
+ <li>{{jsxref("String.prototype.matchAll")}} has been implemented and enabled by default ({{bug(1435829)}}, {{bug(1531830)}}).</li>
+ <li>Support for the dynamic module {{jsxref("Statements/import", "import()", "#Dynamic_Imports")}} proposal is now available by default ({{bug(1517546)}}).</li>
+ <li>The <a href="/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#Hashbang_comments">hashbang grammar</a> proposal is now implemented ({{bug(1519097)}}).</li>
+</ul>
+
+<h3 id="APIs">APIs</h3>
+
+<h4 id="DOM">DOM</h4>
+
+<ul>
+ <li>The default value for {{domxref("Response.statusText")}} is now <code>""</code> ({{bug(1508996)}}).</li>
+ <li>The default value for the {{domxref("VTTCue")}} interface's <code>positionAlign</code> property is now auto ({{bug(1528420)}}).</li>
+ <li>User gestures are now preserved for rejected calls to {{domxref("Document.requestStorageAccess")}}, as well as fulfilled calls ({{bug(1522912)}}).</li>
+</ul>
+
+<h4 id="DOM_events">DOM events</h4>
+
+<ul>
+ <li>CSS transition ({{bug(1530239)}}) and animation ({{bug(1531605)}}) events now fire on disabled (e.g. form) elements.</li>
+ <li>{{domxref("InputEvent.data")}} and {{domxref("InputEvent.dataTransfer")}} have been implemented ({{bug("998941")}}).</li>
+ <li>The <code>insertFromPasteAsQuotation</code> {{domxref("InputEvent.inputType")}} value is now supported ({{bug(1532527)}}).</li>
+</ul>
+
+<h4 id="WorkersService_workers">Workers/Service workers</h4>
+
+<ul>
+ <li>Strict MIME type checks are now enforced on scripts imported by {{domxref("WorkerGlobalScope.importScripts()")}} ({{bug(1514680)}}).</li>
+</ul>
+
+<h4 id="Media_Web_Audio_and_WebRTC">Media, Web Audio, and WebRTC</h4>
+
+<ul>
+ <li><a href="https://code.videolan.org/videolan/dav1d">dav1d</a> is now the default media decoder for <a href="https://aomediacodec.github.io/av1-spec/av1-spec.pdf">AV1</a> (see for example {{bug(1533742)}} and {{bug(1535038)}}).</li>
+ <li>Calling {{domxref("RTCPeerConnection.addTrack()")}} without specifying any streams to which to add the new track now works as expected: it adds a streamless track to the connection. Each peer is responsible for managing the association between the track and any stream on its end ({{bug(1231414)}}).</li>
+ <li>The {{domxref("MediaDeviceInfo.groupId")}} property is now implemented ({{bug(1213453)}}). While it has existed in Firefox since Firefox 39, it did not actually gather related devices together into the same group IDs.</li>
+ <li>The {{domxref("RTCIceCandidate.usernameFragment")}} property is now implemented ({{bug(1490658)}}).</li>
+</ul>
+
+<h4 id="Canvas_and_WebGL">Canvas and WebGL</h4>
+
+<ul>
+ <li>The <code><a href="/en-US/docs/Web/API/EXT_float_blend">EXT_float_blend</a></code> WebGL extension has been enabled by default ({{bug(1535808)}}).</li>
+</ul>
+
+<h4 id="Removals_3">Removals</h4>
+
+<ul>
+ <li>The deprecated <code>ShadowRoot.getElementsByTagName</code>, <code>ShadowRoot.getElementsByTagNameNS</code>, and <code>ShadowRoot.getElementsByClassName</code> properties (part of Shadow DOM v0) have been removed ({{bug(1535438)}}).</li>
+ <li><code><a href="/en-US/docs/Web/API/Document/createEvent">Document.createEvent("TouchEvent")</a></code>, {{domxref("Document.createTouch()")}}, {{domxref("Document.createTouchList()")}}, and the <code>ontouch*</code> event handler properties have been disabled on desktop to improve web compatibility on websites where touch support is used for mobile detection ({{bug(1412485)}}). In such cases, websites have been seen to behave incorrectly or unexpectedly on touchscreen laptops.</li>
+</ul>
+
+<h3 id="Security">Security</h3>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/Notifications_API">Notifications</a> are now only available in a <a href="/en-US/docs/Web/Security/Secure_Contexts">secure context</a> ({{bug(1429432)}}).</li>
+ <li>Firefox now blocks the loading of external protocol URLs in {{htmlelement("iframe")}}s ({{bug(1527882)}}).</li>
+</ul>
+
+<h3 id="WebDriver_conformance_(Marionette)">WebDriver conformance (Marionette)</h3>
+
+<h4 id="API_changes">API changes</h4>
+
+<ul>
+ <li>Made <code>WebDriver:SendAlertText</code> conformant to the <a href="https://w3c.github.io/webdriver/">WebDriver specification</a> ({{bug(1502360)}}).</li>
+</ul>
+
+<h4 id="Corrección_de_errores">Corrección de errores</h4>
+
+<ul>
+ <li><code>WebDriver:NewWindow</code> will no longer timeout because of <code>focus</code>-related inconsistencies across platforms ({{bug(1523234)}}).</li>
+</ul>
+
+<h4 id="Otros">Otros</h4>
+
+<ul>
+ <li>Both <code>WebDriver:ExecuteScript</code> and <code>WebDriver:ExecuteAsyncScript</code> now use <code>Promises</code> internally ({{bug(1398095)}}).</li>
+ <li><code>WebDriver:NewSession</code> returns Firefox's <code>BuildID</code> string as part of the capabilities object ({{bug(1525829)}}).</li>
+</ul>
+
+<h2 id="Changes_for_add-on_developers">Changes for add-on developers</h2>
+
+<h3 id="Cambios_en_API">Cambios en API</h3>
+
+<ul>
+ <li>Using the <code>proxy.settings.set()</code> method to change <code>{{WebExtAPIRef("types.BrowserSetting", "BrowserSetting")}}</code> values will throw an exception unless the extension was granted private window access by the user ({{bug(1525447)}}).</li>
+</ul>
+
+<h3 id="Cambios_en_manifiesto">Cambios en manifiesto</h3>
+
+<ul>
+ <li>A new manifest key, <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/incognito">incognito</a>, defines the behavior of an extension in private browsing windows or tabs ({{bug(1511636)}}).</li>
+ <li>The <code>toolbar_field_highlight</code> setting controls the background color used to indicate the current selection of text in the URL bar ({{bug(1450114)}}).</li>
+ <li>The <code>toolbar_field_highlight_text</code> setting controls the text color used to indicate the current selection of text in the URL bar ({{bug(1450114)}}).</li>
+</ul>
+
+<h2 id="Ver_también">Ver también</h2>
+
+<ul>
+ <li><a href="https://www.fxsitecompat.com/en-CA/versions/67/">Sitio de compatibilidad para Firefox 67</a></li>
+</ul>
+
+<h2 id="Versiones_anteriores">Versiones anteriores</h2>
+
+<p>{{Firefox_for_developers(66)}}</p>
diff --git a/files/es/mozilla/firefox/releases/68/index.html b/files/es/mozilla/firefox/releases/68/index.html
new file mode 100644
index 0000000000..4c2649dcd2
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/68/index.html
@@ -0,0 +1,233 @@
+---
+title: Firefox 68 for developers
+slug: Mozilla/Firefox/Releases/68
+translation_of: Mozilla/Firefox/Releases/68
+---
+<p>{{FirefoxSidebar}}</p>
+
+<p class="summary">This article provides information about the changes in Firefox 68 that will affect developers. Firefox 68 was released on July 9, 2019.</p>
+
+<h2 id="Changes_for_web_developers">Changes for web developers</h2>
+
+<h3 id="Developer_tools">Developer tools</h3>
+
+<h4 id="Browserweb_console">Browser/web console</h4>
+
+<ul>
+ <li>The Web console now shows <a href="/en-US/docs/Tools/Web_Console/Console_messages#CSS">more information about CSS warnings</a>, including a node list of the DOM elements that used the rule ({{bug(1093953)}}).</li>
+ <li>You can now filter content in the Web console using regular expressions ({{bug(1441079)}}).</li>
+ <li>The Browser console now allows you to show or hide messages from the content process by setting or clearing the checkbox labeled <em>Show Content Messages</em> ({{bug(1260877)}}).</li>
+</ul>
+
+<h4 id="JavaScript_debugger">JavaScript debugger</h4>
+
+<ul>
+ <li>You can now <a href="/en-US/docs/Tools/Debugger/How_to/Search#Searching_in_all_files">Search</a> in all files in the current project from the debugger by pressing <kbd>Shift</kbd> + <kbd>Ctrl</kbd> + <kbd>F</kbd> (Windows or Linux) or <kbd>Shift</kbd> + <kbd>Cmd</kbd> + <kbd>F</kbd> (macOS) ({{bug(1320325)}}).</li>
+</ul>
+
+<h4 id="Network_monitor">Network monitor</h4>
+
+<ul>
+ <li>The Network monitor <a href="/en-US/docs/Tools/Network_Monitor/request_list#Filtering_requests">request list</a> now allows you to block a specific URL ({{bug(1151368)}}).</li>
+ <li>You can now resend a network request without editing the method, URL, parameters, and headers, using the <a href="/en-US/docs/Tools/Network_Monitor/request_list#Context_menu">Resend</a> command on the context menu ({{bug(1422014)}}).</li>
+ <li>The context menu of the Network monitor <a href="/en-US/docs/Tools/Network_Monitor/request_details#Headers">Headers</a> tab now allows you to copy all or some of the header information to the clipboard in JSON format ({{bug(1442249)}}).</li>
+</ul>
+
+<h4 id="Page_inspector">Page inspector</h4>
+
+<ul>
+ <li>A button has been added to the <a href="/en-US/docs/Tools/Page_Inspector/How_to/Examine_and_edit_CSS#Examine_CSS_rules">rules panel</a> of the Page inspector that allows you to toggle the display of any print media queries ({{bug(1534984)}}).</li>
+ <li>The <a href="/en-US/docs/Tools/Page_Inspector/How_to/Edit_fonts">fonts panel</a> now includes a slider to modify <code>letter-spacing</code> ({{bug(1536237)}}).</li>
+ <li>A warning icon appears next to unsupported CSS properties or rules that have invalid values, to help you understand why certain styles are not being applied ({{bug(1306054)}}).</li>
+</ul>
+
+<h4 id="Storage_inspector">Storage inspector</h4>
+
+<ul>
+ <li>You can now <a href="/en-US/docs/Tools/Storage_Inspector#Local_storage_Session_storage">delete local and session storage</a> entries by selecting the item in the storage inspector and pressing the backspace key ({{bug(1522893)}}).</li>
+</ul>
+
+<h4 id="Other">Other</h4>
+
+<ul>
+ <li>The <a href="/en-US/docs/Tools/Accessibility_inspector">Accessibility Inspector</a> now includes a new <em>Check for issues</em> feature, which will include a number of audit tools to highlight accessibility problems on your web pages. The first available check is <em>contrast</em>, for highlighting color contrast problems.</li>
+ <li>The preference that controls the visibility of internal extensions (system add-ons and hidden extensions) on the <a href="/en-US/docs/Tools/about:debugging">about:debugging</a> page has been changed from <code>devtools.aboutdebugging.showSystemAddons</code> to <code>devtools.aboutdebugging.showHiddenAddons</code> ({{bug(1544372)}}).</li>
+ <li><a href="/en-US/docs/Tools/Responsive_Design_Mode">Responsive design mode</a> has been redesigned — the <em>Device Settings</em> dialog (device selection menu &gt; <em>Edit List...</em>) is now more intuitive and simpler to use ({{bug(1487857)}}).</li>
+</ul>
+
+<h4 id="Removals">Removals</h4>
+
+<ul>
+ <li>The "Enable add-on debugging" checkbox has been removed from the <a href="/en-US/docs/Tools/about:debugging">about:debugging</a> page ({{bug(1544813)}}).</li>
+</ul>
+
+<h3 id="HTML">HTML</h3>
+
+<ul>
+ <li>The {{HTMLElement("track")}} element — represented by {{domxref("HTMLTrackElement")}} — now receives a {{domxref("HTMLTrackElement.cuechange_event", "cuechange")}} event in addition to the {{domxref("TextTrack")}} itself, if the text track is a contained by a media element ({{bug(1548731)}}).</li>
+ <li>{{htmlelement("link")}} elements support the <code>disabled</code> attribute again, albeit with different behavior. When <code>disabled</code> is set on a <code>&lt;link&gt;</code> element along with <code>rel="stylesheet"</code>, the referenced stylesheet is not loaded during page load, and will be loaded on demand when the <code>disabled</code> attribute is changed to <code>false</code> or removed ({{bug(1281135)}}).</li>
+</ul>
+
+<h4 id="Removals_2"> Removals</h4>
+
+<ul>
+ <li><code><a href="/en-US/docs/Web/HTML/Element/meta">&lt;meta http-equiv="set-cookie"&gt;</a></code> is no longer supported ({{bug(1457503)}}).</li>
+</ul>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li><a href="/en-US/docs/Web/CSS/CSS_Scroll_Snap">CSS Scroll Snapping</a> has been updated to the latest version of the specification ({{bug(1312163)}}) and ({{bug(1544136)}}), this includes:
+
+  <ul>
+   <li>The <code>scroll-padding</code> properties ({{bug(1373832)}})</li>
+   <li>The <code>scroll-margin</code> properties ({{bug(1373833)}})</li>
+   <li>{{CSSxRef("scroll-snap-align")}} ({{bug(1373835)}})</li>
+  </ul>
+ </li>
+ <li>The {{CSSxRef("-webkit-line-clamp")}} property has been implemented for compatibility with other browsers ({{bug(866102)}}).</li>
+ <li>Support has been added for the {{CSSxRef("::marker")}} pseudo-element ({{bug(205202)}}) and animation for <code>::marker</code> pseudos ({{bug(1538618)}})</li>
+ <li>We changed {{CSSxRef("currentColor")}} to be a computed value (except for the {{cssxref("color")}} property)  ({{bug(760345)}}).</li>
+ <li>Support has been fixed for the <code>ch</code> length unit so it now matches the spec (fallback for no '0' glyph, vertical metrics) ({{bug(282126)}})</li>
+ <li>The  {{CSSxRef("counter-set")}} property has been implemented. ({{bug(1518201)}}).</li>
+ <li>We now implement list numbering using a built-in "list-item" counter; this fixes list numbering bugs ({{bug(288704)}}).</li>
+ <li>Selector matching and parsing support has been implemented for <code><a href="/en-US/docs/Web/CSS/::part">::part()</a></code> ({{bug(1545430)}}) and ({{bug(1545425)}}).</li>
+ <li><a href="/en-US/docs/Web/CSS/CSS_Transforms">CSS Transforms</a> are now supported in indirectly rendered things e.g.)  {{SVGElement("mask")}},  {{SVGElement("marker")}},  {{SVGElement("pattern")}},  {{SVGElement("clipPath")}} ({{bug(1323962)}}).</li>
+ <li>
+  <p>While we're keeping the prefixed versions of the various gradient properties ({{cssxref("linear-gradient")}}, {{cssxref("radial-gradient")}}, and {{cssxref("repeating-radial-gradient")}} available for compatibility reasons, we have revised how they're parsed so that they're handled much more like the non-prefixed versions. This means that certain existing styles won't work correctly.</p>
+
+  <p>In particular, the complicated syntax taking both an angle and a position will no longer work, and the <code>to</code> keyword in the <code>&lt;side-or-corner&gt;</code> parameter is not required for the prefixed gradient properties. You are encouraged to use the standard, non-prefixed gradient properties instead, as they're now widely supported ({{bug(1547939)}}).</p>
+ </li>
+</ul>
+
+<h4 id="Removals_3">Removals</h4>
+
+<ul>
+ <li>{{CSSxRef("scroll-snap-coordinate")}}, {{CSSxRef("scroll-snap-destination")}}, {{CSSxRef("scroll-snap-type-x")}} and {{CSSxRef("scroll-snap-type-y")}} have been removed.</li>
+ <li>The {{CSSxRef("scroll-snap-type")}} property has become a longhand, so the old shorthand syntax like <code>scroll-snap-type:mandatory</code> will stop working. See the <a href="https://www.fxsitecompat.com/en-CA/docs/2019/legacy-css-scroll-snap-syntax-support-has-been-dropped/">Firefox Site Compatability</a> note.</li>
+</ul>
+
+<h3 id="SVG">SVG</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<ul>
+ <li>The new {{jsxref("BigInt")}} primitive is enabled by default ({{bug(1527902)}}).</li>
+</ul>
+
+<h3 id="APIs">APIs</h3>
+
+<h4 id="CSS_Object_Model_(CSSOM)">CSS Object Model (CSSOM)</h4>
+
+<ul>
+ <li>The legacy {{domxref("CSSStyleSheet.rules", "rules")}} property and {{domxref("CSSStyleSheet.addRule", "addRule()")}} and {{domxref("CSSStyleSheet.removeRule", "removeRule()")}} methods have been added to the {{domxref("CSSStyleSheet")}} interface. These were introduced by Internet Explorer 9 and have never managed to quite be stamped out, so they have been added to improve compatibility with the small percentage of sites that still use them ({{bug(1545823)}}).</li>
+</ul>
+
+<h4 id="DOM">DOM</h4>
+
+<ul>
+ <li>The <a href="/en-US/docs/Web/API/Visual_Viewport_API">Visual Viewport API</a> has now been enabled by default on Android ({{bug(1512813)}}). Adding this API to desktop versions of Firefox is being tracked in {{bug(1551302)}}.</li>
+ <li>The {{domxref("Window")}} feature <code><a href="/en-US/docs/Web/API/Window/open#noreferrer">noreferrer</a></code> is now supported; if specified, the new window's content is loaded without sharing the hostname, IP address, URL, or other identifying information about the host device ({{bug(1527287)}}).</li>
+ <li>The {{domxref("HTMLImageElement.decode", "decode()")}} method on <code>HTMLImageElement</code> is now implemented. This can be used to trigger loading and decoding of an image prior to adding it to the DOM ({{bug(1501794)}}).</li>
+ <li>{{domxref("XMLHttpRequest")}} has been updated to no longer accept the non-standard <code>moz-chunked-arraybuffer</code> value for {{domxref("XMLHttpRequest.responseType", "responseType")}}. Code still using it should be updated to <a href="/en-US/docs/Web/API/Streams_API/Using_readable_streams#Consuming_a_fetch_as_a_stream">use the Fetch API as a stream</a> ({{bug(1120171)}}).</li>
+ <li><code>XMLHttpRequest</code> now outputs a warning to console if you perform a synchronous request while handling an {{domxref("Window.unload_event", "unload")}}, {{domxref("Window.beforeunload_event", "beforeunload")}}, or {{domxref("Window.pagehide_event", "pagehide")}} event ({{bug(980902)}}).</li>
+ <li>The {{domxref("Document.cookie", "cookie")}} property has moved from the {{domxref("HTMLDocument")}} interface to the {{domxref("Document")}} interface, allowing documents other than {{Glossary("HTML")}} to use cookies ({{bug(144795)}}).</li>
+ <li>The {{domxref("HTMLElement.focus()")}} and {{domxref("SVGElement.focus()")}} methods now accept an optional object that may contain a boolean <code>preventScroll</code> option specifying whether or not to block the browser from scrolling the newly-focused element into view ({{bug(1374045)}}).</li>
+</ul>
+
+<h4 id="DOM_events">DOM events</h4>
+
+<ul>
+ <li><a href="/en-US/docs/Mozilla/Firefox_for_Android">Firefox for Android</a> no longer incorrectly sends a {{domxref("Window.resize_event", "resize")}} event until after the first frame is painted; this improves web compatibility with sites that don't expect this event to occur ({{bug(1528052)}}).</li>
+ <li>The dispatching of events for non-primary mouse buttons has been made to more closely follow the specification; the {{domxref("Element.click_event", "click")}} event is no longer sent when non-primary buttons are clicked, instead using {{domxref("Element.auxclick_event", "auxclick")}}. In addition, {{domxref("Element.dblclick_event", "dblclick")}} no longer fires for non-primary buttons ({{bug(1379466)}}).</li>
+ <li>The proprietary {{domxref("MouseEvent.mozPressure")}} property has been deprecated, and will now trigger a warning in the console ({{bug(1165211)}}).</li>
+</ul>
+
+<h4 id="Media_Web_Audio_and_WebRTC">Media, Web Audio, and WebRTC</h4>
+
+<ul>
+ <li>WebRTC has been updated to recognize that a <code>null</code> candidate passed into the {{domxref("RTCPeerConnection.icecandidate", "icecandidate")}} event handler, indicating the receipt of a candidate, instead indicates that there are no further candidates coming; when this happens the ICE gathering ({{domxref("RTCPeerConnection.iceGatheringState", "iceGatheringState")}}) state reaches <code>complete</code> ({{bug(1318167)}}).</li>
+ <li>The {{domxref("RTCRtpReceiver")}} methods {{domxref("RTCRtpReceiver.getContributingSources", "getContributingSources()")}} and {{domxref("RTCRtpReceiver.getSynchronizationSources", "getSynchronizationSources()")}} now support video tracks; previously they only worked on audio ({{bug(1534466)}}).</li>
+ <li>The Web Audio API {{domxref("MediaStreamTrackAudioSourceNode")}} interface is now supported, as is the method {{domxref("AudioContext.createMediaStreamTrackSource()")}} ({{bug(1324548)}}).</li>
+ <li>{{domxref("RTCDataChannel.negotiated")}} is now implemented ({{bug(1529695)}}).</li>
+ <li>The {{domxref("MediaStreamAudioSourceNode.MediaStreamAudioSourceNode", "MediaStreamAudioSourceNode()")}} constructor has been updated to match the current specification's definition that the "first audio track" in the stream is the track whose ID comes first in lexicographical order ({{bug(1324548)}}).</li>
+ <li>
+  <p>{{domxref("MediaDevices.getUserMedia", "getUserMedia()")}} may no longer be used from a non-secure context; attempting to do so now throws a <code>NotAllowedError</code> exception. Secure contexts are those loaded using HTTPS, those located using the <code>file:///</code> scheme, and those loaded from <code>localhost</code>. For now, if you must, you can re-enable the ability to perform insecure calls to <code>getUserMedia()</code> by setting the preference <code>media.getusermedia.insecure.enabled</code> to <code>true</code> ({{bug(1335740)}}).</p>
+
+  <div class="blockIndicator note">
+  <p><strong>Note:</strong> In the future, Firefox will also remove the {{domxref("navigator.mediaDevices")}} property on insecure contexts, preventing all access to the {{domxref("MediaDevices")}} APIs. <strong>This is already the case in Nightly builds.</strong></p>
+  </div>
+ </li>
+</ul>
+
+<h4 id="Removals_4">Removals</h4>
+
+<ul>
+ <li>Removed the non-standard {{DOMxRef("XMLDocument.load()")}} method ({{bug(332175)}}).</li>
+ <li>Removed the non-standard {{DOMxRef("XMLDocument.async")}} property ({{bug(1328138)}}).</li>
+ <li>The {{domxref("RTCIceCredentialType")}} <code>token</code> value has been removed ({{bug(1529595)}}).</li>
+</ul>
+
+<h3 id="HTTP">HTTP</h3>
+
+<ul>
+ <li>The <a href="/en-US/docs/Web/HTTP">HTTP</a> {{HTTPHeader("Clear-Site-Data")}} header no longer supports the <code>executionContexts</code> directive. This was removed due to problems with interactions between interconnections among different kinds of data at different points in the navigation process and the way the specification is designed. It <a href="https://github.com/w3c/webappsec-clear-site-data/issues/59">has been proposed</a> that this directive be removed from the specification for this reason, among others ({{bug(1548034)}}).</li>
+</ul>
+
+<h4 id="Removals_5">Removals</h4>
+
+<ul>
+ <li>The {{HTTPHeader("Content-Security-Policy")}} directive <code>require-sri-for</code> is no longer supported due to concerns about its standardization status. It was previously available only behind a preference, which was off by default ({{bug(1386214)}}).</li>
+</ul>
+
+<h3 id="Security">Security</h3>
+
+<p><em>No changes.</em></p>
+
+<h3 id="WebDriver_conformance_(Marionette)">WebDriver conformance (Marionette)</h3>
+
+<h4 id="Bug_fixes">Bug fixes</h4>
+
+<ul>
+ <li>If <code>WebDriver:SwitchToWindow</code> changes the selection to a different window it now waits for its <code>focus</code> and <code>activate</code> events before returning ({{bug(1335085)}}).</li>
+ <li>Fixed the <code>TypeError: this.tabModal is null</code> failure, which sometimes appeared when interacting with modal dialogs or user prompts ({{bug(1538782)}})</li>
+</ul>
+
+<h4 id="Other_2">Other</h4>
+
+<ul>
+ <li>Disabled the feature to force unloading background tabs on low memory conditions, to prevent top-level browser contexts from magically disappearing ({{bug(1553748)}}).</li>
+ <li>Disabled priviledged content processes that caused HTTP authentication dialogs not to appear when navigating to a website after opening a new tab ({{bug(1558763)}}).</li>
+</ul>
+
+<h3 id="Plugins">Plugins</h3>
+
+<p><em>No changes.</em></p>
+
+<h2 id="Changes_for_add-on_developers">Changes for add-on developers</h2>
+
+<h3 id="API_changes">API changes</h3>
+
+<ul>
+ <li>The The <code>proxy.register()</code> and <code>proxy.unregister()</code> functions have been deprecated and will be removed from Firefox 71 ({{bug(1545811)}}).</li>
+ <li>When an add-on attempts to add a bookmark folder to the root folder, the resulting error message is now much more intuitive ({{bug(1512171)}}).</li>
+ <li>The promise returned by <code><a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/duplicate">browser.tabs.duplicate()</a></code> now resolves immediately, before the tabs are completely loaded, to improve performance ({{bug(1394376)}}).</li>
+ <li>Support has been added for chrome.storage.managed, allowing web extension settings to be implemented via enterprise policy ({{bug(1230802)}}).</li>
+ <li>There is now a Group Policy option to blacklist <em>all</em> extensions except the ones that have been whitelisted ({{bug(1522823)}}).</li>
+</ul>
+
+<h3 id="Manifest_changes">Manifest changes</h3>
+
+<p><em>No changes.</em></p>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="https://www.fxsitecompat.com/en-CA/versions/68/">Site compatibility for Firefox 68</a></li>
+</ul>
+
+<h2 id="Older_versions">Older versions</h2>
+
+<p>{{Firefox_for_developers(67)}}</p>
diff --git a/files/es/mozilla/firefox/releases/9/index.html b/files/es/mozilla/firefox/releases/9/index.html
new file mode 100644
index 0000000000..4e976f6262
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/9/index.html
@@ -0,0 +1,237 @@
+---
+title: Firefox 9 for developers
+slug: Mozilla/Firefox/Releases/9
+tags:
+  - Firefox
+  - Firefox 9
+  - Gecko 9
+  - NeedsTranslation
+  - TopicStub
+translation_of: Mozilla/Firefox/Releases/9
+---
+<div><section class="Quick_links" id="Quick_Links">
+  <ol>
+    <li class="toggle">
+        <details>
+            <summary>Notas de la Versión para Desarrolladores de Firefox</summary>
+            <ol>
+              <li><a href="/es/docs/Mozilla/Firefox/Releases">Notas de la Versión para Desarrolladores de Firefox</a></li>
+            </ol>
+        </details>
+    </li>
+    <li class="toggle">
+        <details>
+            <summary>Complementos</summary>
+            <ol>
+              <li><a href="/es/Add-ons/WebExtensions">Extensiones del navegador</a></li>
+              <li><a href="/es/Add-ons/Themes">Temas</a></li>
+            </ol>
+        </details>
+    </li>
+    <li class="toggle">
+        <details>
+            <summary>Firefox por dentro</summary>
+            <ol>
+              <li><a href="/es/docs/Mozilla/">Proyecto Mozilla (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/Gecko">Gecko</a></li>
+              <li><a href="/es/docs/Mozilla/Firefox/Headless_mode">Headless mode</a></li>
+              <li><a href="/es/docs/Mozilla/JavaScript_code_modules">Modulos de código JavaScript (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/js-ctypes">JS-ctypes (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/MathML_Project">Proyecto MathML</a></li>
+              <li><a href="/es/docs/Mozilla/MFBT">MFBT (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/Projects">Proyectos Mozilla (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/Preferences">Sistema de Preferencias (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/WebIDL_bindings">Ataduras WebIDL (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/Tech/XPCOM">XPCOM</a></li>
+              <li><a href="/es/docs/Mozilla/Tech/XUL">XUL</a></li>
+            </ol>
+        </details>
+    </li>
+    <li class="toggle">
+        <details>
+            <summary>Crear y contribuir</summary>
+            <ol>
+              <li><a href="/es/docs/Mozilla/Developer_guide/Build_Instructions">Instrucciones para la compilación</a></li>
+              <li><a href="/es/docs/Mozilla/Developer_guide/Build_Instructions/Configuring_Build_Options">Configurar las opciones de compilación</a></li>
+              <li><a href="/es/docs/Mozilla/Developer_guide/Build_Instructions/How_Mozilla_s_build_system_works">Cómo funciona el sistema de compilación (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/Developer_guide/Source_Code/Mercurial">Código fuente de Mozilla</a></li>
+              <li><a href="/es/docs/Mozilla/Localization">Localización</a></li>
+              <li><a href="/es/docs/Mozilla/Mercurial">Mercurial (Inglés)</a></li>
+              <li><a href="/es/docs/Mozilla/QA">Garantía de Calidad</a></li>
+              <li><a href="/es/docs/Mozilla/Using_Mozilla_code_in_other_projects">Usar Mozilla en otros proyectos (Inglés)</a></li>
+            </ol>
+        </details>
+    </li>
+  </ol>
+</section></div>
+
+<p>Firefox 9 was released for Windows on December 20, 2011. Mac and Linux version 9.0.1, which fixed a crashing bug discovered at the last minute, were released on December 21, 2011.</p>
+
+<h2 id="Changes_for_web_developers">Changes for web developers</h2>
+
+<h3 id="HTML">HTML</h3>
+
+<ul>
+ <li>The <code>value</code> attribute of <a href="/es/docs/Web/HTML/Elemento/li" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>&lt;li&gt;</code></a> now can be negative as specified in HTML5. Previously negative values were converted to 0.</li>
+ <li>You can now <a href="/en-US/docs/Using_HTML5_audio_and_video#Specifying_playback_range" title="en-US/docs/Using_HTML5_audio_and_video#Specifying_playback_range">specify the start and stop time of media</a> in the URI of the media when using <a href="/es/docs/Web/HTML/Elemento/audio" title="El elemento audio se usa para insertar contenido de audio en un documento HTML o XHTML. El elemento audio se agregó como parte de HTML 5."><code>&lt;audio&gt;</code></a> and <a href="/es/docs/Web/HTML/Elemento/video" title="El elemento video se utiliza para incrustar vídeos en un documento HTML o XHTML."><code>&lt;video&gt;</code></a> elements.</li>
+ <li><a href="/es/docs/Web/HTML/Elemento/input" title="El elemento HTML &lt;input> se usa para crear controles interactivos para formularios basados en la web, que reciban datos del usuario. La forma en que &lt;input> funciona varía considerablemente dependiendo del valor de su atributo type."><code>&lt;input&gt;</code></a> and <a href="/es/docs/Web/HTML/Elemento/textarea" title="El elemento HTML &lt;textarea> representa un control para edición muti-línea de texto plano."><code>&lt;textarea&gt;</code></a> elements <a href="/en-US/docs/HTML/Controlling_spell_checking_in_HTML_forms#Controlling_the_spellchecker_language" title="en-US/docs/HTML/Controlling_spell_checking_in_HTML_forms#Controlling_the_spellchecker_language">now respect the value of the <code>lang</code> attribute</a> when invoking the spell checker.</li>
+ <li>Firefox on Android now lets users snap photos with their phone's camera without leaving the browser when the <a href="/es/docs/Web/HTML/Elemento/input" title="El elemento HTML &lt;input> se usa para crear controles interactivos para formularios basados en la web, que reciban datos del usuario. La forma en que &lt;input> funciona varía considerablemente dependiendo del valor de su atributo type."><code>&lt;input&gt;</code></a> element is used with <code>type="file"</code> and <code>accept="image/*"</code>.</li>
+ <li>Windows Vista style PNG ICO images are now supported.</li>
+ <li>Drawing images that use the <a href="/en-US/docs/HTML/CORS_settings_attributes" title="CORS settings attributes"><code>crossorigin</code></a> attribute to request CORS access no longer incorrectly <a href="/en-US/docs/CORS_Enabled_Image#What_is_a_.22tainted.22_canvas.3F" title="en-US/docs/CORS_Enabled_Image#What_is_a_.22tainted.22_canvas.3F">taint the canvas</a> when CORS is granted.</li>
+ <li>The value of the <code><a href="/es/docs/Web/HTML/Element/td#attr-rowspan">rowspan</a></code> attribute may now be as large as 65,534, up from 8190.</li>
+</ul>
+
+<h3 id="CSS">CSS</h3>
+
+<ul>
+ <li>The <a href="/es/docs/Web/CSS/font-stretch" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>font-stretch</code></a> property is now supported.</li>
+ <li>The <a href="/es/docs/Web/CSS/columns" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>columns</code></a> property is now supported, with the <code>-moz</code> prefix. This is a shorthand for the following properties: <a href="/es/docs/Web/CSS/column-width" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>column-width</code></a> and <a href="/es/docs/Web/CSS/column-count" title="La propiedad CSS column-count define el número de columnas de un elemento."><code>column-count</code></a>.</li>
+ <li>When a stylesheet included using the <a href="/es/docs/Web/HTML/Elemento/link" title="El elemento HTML &lt;link> especifica la relación entre el documento actual y un recurso externo. Los usos posibles de este elemento incluyen la definición de un marco relacional para navegación. Este elemento es más frecuentemente usado para enlazar hojas de estilos."><code>&lt;link&gt;</code></a> element has been fully loaded and parsed (but not yet applied to the document), a <a href="/en-US/docs/HTML/Element/link#Stylesheet_load_events" title="en-US/docs/HTML/Element/link#Stylesheet_load_events"><code>load</code> event</a> is now fired. Also, if an error occurs processing a style sheet, an <code>error</code> event is fired.</li>
+ <li>You can now specify overflow settings for both the left and right edges of content using a new two-value syntax for <a href="/es/docs/Web/CSS/text-overflow" title="La propiedad de CSS text-overflow determina como el contenido que se desborda y que no es mostrado, va a hacersele notar a los usuarios. Puede ser cortado, mostrar una elipsis ('…', U+2026 Horizontal Ellipsis), o mostrar una cadena de texto personalizada."><code>text-overflow</code></a>.</li>
+</ul>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<p><em>No change.</em></p>
+
+<h3 id="DOM">DOM</h3>
+
+<dl>
+ <dt><a href="/en-US/docs/DOM/Using_full-screen_mode" title="Using full-screen mode">Using full-screen mode</a></dt>
+ <dd>The new full-screen API provides a way to present content using the entire screen, with no browser interface. This is great for video and games. This API is currently experimental and prefixed.</dd>
+</dl>
+
+<ul>
+ <li>The <a href="/es/docs/Web/API/Node/contains" title="El método Node.contains() devuelve un valor Boolean indicando si un nodo es descendiente de un nodo dado o no, por ejemplo, el propio nodo, uno de sus hijos directos ((childNodes)), uno de los hijos directos de su nodo hijo, etc."><code>Node.contains()</code></a> method is now implemented; this lets you determine if a given node is a descendant of another node.</li>
+ <li>The <a href="/es/docs/Web/API/Node/parentElement" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>Node.parentElement</code></a> attribute has been implemented; this returns the parent <a href="/es/docs/Web/API/Element" title="Varias especificaciones aplicadas a los elementos:"><code>Element</code></a> of a DOM node, or <code>null</code> if the parent isn't an element.</li>
+ <li>DOM Level 3 <a href="/en-US/docs/DOM/CompositionEvent" title="CompositionEvent">composition events</a> are now supported.</li>
+ <li>The <a href="/es/docs/Web/API/Document/scripts" title="Devuelve una lista de elementos &lt;script> ubicados en el documento. El objeto devuelto es una colección HTMLCollection."><code>Document.scripts</code></a> attribute has been implemented; this returns an <a href="/es/docs/Web/API/HTMLCollection" title="La interfaz HTMLCollection representa una colección genérica (objeto tipo array similar a arguments) de elementos (en orden de documento) y ofrece métodos y propiedades para seleccionarlos de la lista."><code>HTMLCollection</code></a> of all the <a href="/es/docs/Web/HTML/Elemento/script" title="El elemento HTML Script (&lt;script>) se utiliza para insertar o hacer referencia a un script ejecutable dentro de un documento HTML o XHTML."><code>&lt;script&gt;</code></a> elements on the document.</li>
+ <li>The <a href="/es/docs/Web/API/Document/queryCommandSupported" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>Document.queryCommandSupported()</code></a> method has been implemented.</li>
+ <li>The set of events that can be listened for on <a href="/es/docs/Web/HTML/Elemento/body" title="El Elemento HTML &lt;body> representa el contenido de un documento HTML. Sólo puede haber un elemento &lt;body> en un documento."><code>&lt;body&gt;</code></a> elements has been revised to match the latest draft of the HTML5 specification. The list of events in the <a href="/en-US/docs/DOM/DOM_event_reference" title="DOM event reference">DOM event reference</a> reflects which events can be listened for on <a href="/es/docs/Web/HTML/Elemento/body" title="El Elemento HTML &lt;body> representa el contenido de un documento HTML. Sólo puede haber un elemento &lt;body> en un documento."><code>&lt;body&gt;</code></a>.</li>
+ <li>The <code>readystatechange</code> event is now fired only on the <a href="/es/docs/Web/API/Document" title="La interfaz Document representa cualquer página web cargada en el navegador y sirve como punto de entrada al contenido de la página (El árbol DOM)."><code>Document</code></a>, as intended.</li>
+ <li>Event handlers are now implemented as standard IDL interfaces. For most cases, this won't affect content, but <a href="/en-US/docs/DOM/DOM_event_handlers#Event_handler_changes_in_Firefox_9" title="en-US/docs/DOM/DOM_event_handlers#Event_handler_changes_in_Firefox_9">there are exceptions</a>.</li>
+ <li>A new response type, "<code>moz-json</code>", has been added to <code>XMLHttpRequest</code>, letting <code>XMLHttpRequest</code> automatically parse <a href="/en-US/docs/JSON" title="JSON">JSON</a> strings for you; when you request this type, a returned JSON string is parsed, so that the value of the <code>response</code> property is the resulting JavaScript object.</li>
+ <li><a href="/en-US/docs/DOM/XMLHttpRequest/Using_XMLHttpRequest#Monitoring_progress" title="en-US/docs/DOM/XMLHttpRequest/Using_XMLHttpRequest#Monitoring_progress"><code>XMLHttpRequest</code> "progress" events</a> are now reliably sent for every chunk of data received; in the past it was possible for the last chunk of data received to not fire a "progress" event. Now you can track progress by following only "progress" events, instead of also having to monitor "load" events to detect the receipt of the last chunk of data.</li>
+ <li>In the past, calling <a href="/en-US/docs/DOM/element.addEventListener" title="element.addEventListener"><code>addEventListener()</code></a> with a <code>null</code> listener would throw an exception. Now it returns without error and with no effect.</li>
+ <li>The new <a href="/es/docs/Web/API/Navigator/doNotTrack" title='Devuelve los ajustes de do-not-track del usuario. Esto es "1" si el usuario ha solicitado no ser rastreado por sitios web, contenidos, o anuncios.'><code>navigator.doNotTrack</code></a> property lets your content easily determine whether or not the user has enabled their do-no-track preference; if this value is "yes", you should not track the user.</li>
+ <li><a href="/es/docs/Web/API/Range" title="El objeto Range representa un fragmento de un documento que puede contener nodos y partes de nodos de texto en un documento dado."><code>Range</code></a> and <a href="/es/docs/Web/API/Selection" title="Selección es la clase de objeto devuelto por  window.getSelection() y otros métodos."><code>Selection</code></a> objects now behave according to their specifications when <a href="/es/docs/Web/API/Text/splitText" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>splitText()</code></a> and <a href="/es/docs/Web/API/Node/normalize" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>normalize()</code></a> are called.</li>
+ <li>The value of <a href="/es/docs/Web/API/Node/ownerDocument" title="La propiedad de lectura Nodo.ownerDocument devuelve el objecto Document de más alto nivel/jerarquia para ese nodo."><code>Node.ownerDocument</code></a> for doctype nodes is now the document on which <a href="/en-US/docs/DOM/DOMImplementation.createDocumentType" title="DOMImplementation.createDocumentType"><code>createDocumentType()</code></a> was called to create the node, instead of <code>null</code>.</li>
+ <li><code>window.navigator.taintEnabled</code> has been removed; it has not been supported in many years.</li>
+</ul>
+
+<h3 id="Workers">Workers</h3>
+
+<ul>
+ <li>Workers implemented in blob URLs were broken in Firefox 8, and work again starting in Firefox 9.</li>
+</ul>
+
+<h3 id="WebGL">WebGL</h3>
+
+<ul>
+ <li>The <a href="/en-US/docs/WebGL" title="WebGL">WebGL</a> context <code>drawingBufferWidth</code> and <code>drawingBufferHeight</code> attributes are now supported.</li>
+</ul>
+
+<h3 id="MathML">MathML</h3>
+
+<ul>
+ <li>The non-standard <code>restyle</code> value for the <code>actiontype</code> attribute on <code><a href="/es/docs/Web/MathML/Elemento/maction" title="&lt;maction>">&lt;maction&gt;</a></code> elements has been removed.</li>
+ <li>While still unsupported, using the <code><a href="/es/docs/Web/MathML/Elemento/mlabeledtr" title="&lt;mlabeledtr>">&lt;mlabeledtr&gt;</a></code> element no longer breaks rendering completely. See <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=689641" title="Add support for mlabeledtr">error 689641</a> for progress on actual support of this element.</li>
+</ul>
+
+<h3 id="Networking">Networking</h3>
+
+<ul>
+ <li>You can now send the contents of <a href="/en-US/docs/JavaScript_typed_arrays" title="JavaScript typed arrays">JavaScript typed arrays</a> (that is, the contents of an <a href="/en-US/docs/JavaScript_typed_arrays/ArrayBuffer" title="ArrayBuffer"><code>ArrayBuffer</code></a> object) <a href="/en-US/docs/DOM/XMLHttpRequest/Using_XMLHttpRequest#Sending_typed_arrays_as_binary_data" title="en-US/docs/DOM/XMLHttpRequest/Using_XMLHttpRequest#Sending_typed_arrays_as_binary_data">using XMLHttpRequest</a>.</li>
+ <li>WebSocket connections now permit non-characters in otherwise valid UTF-8 data frames to be received, instead of failing.</li>
+ <li>The HTTP <code>Accept</code> header for XSLT requests has been changed to simply "*/*" for simplicity. Since fetching XSLT has always fallen back to "*/*" anyway, it made sense to simplify the initial request.</li>
+ <li>Attempts by a server to use the <code>301 Moved Permanently</code> or <code>307 Temporary Redirect</code> response codes to redirect the user to a <code>javascript:</code> URI now <a href="/en-US/docs/HTTP#More_on_redirection_responses" title="en-US/docs/HTTP#More_on_redirection_responses">result in a "bad connection" error</a> instead of actually redirecting. This prevents certain types of cross-site scripting attacks.</li>
+ <li>Content served with an empty <a href="/es/docs/Web/HTTP/Headers/Content-Disposition" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>Content-Disposition</code></a> were previously treated as if the <a href="/es/docs/Web/HTTP/Headers/Content-Disposition" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>Content-Disposition</code></a> were "attachment"; this didn't always work as expected. These are now handled as if the <a href="/es/docs/Web/HTTP/Headers/Content-Disposition" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>Content-Disposition</code></a> were "inline".</li>
+ <li>The default maximum size of an item in the disk cache has been increased to 50 MB; previously, only items up to 5 MB were cached.</li>
+</ul>
+
+<h3 id="Developer_tools">Developer tools</h3>
+
+<ul>
+ <li>The web console now supports basic <a href="/en-US/docs/Using_the_Web_Console#String_substitutions" title="en-US/docs/Using_the_Web_Console#String_substitutions">string substitutions</a> in its logging methods.</li>
+ <li>You can now <a href="/en-US/docs/Using_the_Web_Console#Using_groups_in_the_console" title="en-US/docs/Using_the_Web_Console#Using_groups_in_the_console">create visually nested blocks of output</a> in the web console, to help make it easier to read.</li>
+</ul>
+
+<h2 id="Changes_for_Mozilla_and_add-on_developers">Changes for Mozilla and add-on developers</h2>
+
+<p>See <a href="/en-US/docs/Firefox/Updating_add-ons_for_Firefox_9" title="en-US/docs/Firefox/Updating add-ons for Firefox 9">Updating add-ons for Firefox 9</a> for an overview of the changes you may need to make to get your add-ons working in Firefox 9.</p>
+
+<h3 id="XUL">XUL</h3>
+
+<ul>
+ <li>The <code><a href="/es/docs/Mozilla/Tech/XUL/tab" title="tab">tab</a></code> element now has a <code id="a-pending"><a href="https://developer.mozilla.org/es/docs/Mozilla/Tech/XUL/Attribute/pending">pending</a></code> attribute, whose value is <code>true</code>, when the tab is in the process of being restored by the session store service. This can be used for styling the tab in themes. The attribute isn't present on tabs that aren't pending.</li>
+ <li>The <code><a href="/es/docs/Mozilla/Tech/XUL/tab" title="tab">tab</a></code> element now has an <code id="a-unread"><a href="https://developer.mozilla.org/es/docs/Mozilla/Tech/XUL/Attribute/unread">unread</a></code> attribute, whose value is <code>true</code>, when the tab has changed since the last time it was the active tab or if it hasn't been selected since the current session began. The attribute isn't present on tabs that are not unread.</li>
+ <li>You can now use a <code><a href="/es/docs/Mozilla/Tech/XUL/panel" title="panel">panel</a></code> as a drag image for DOM drag and drop operations. This lets you use the standard drag &amp; drop API for <a href="/en-US/docs/DragDrop/Drag_Operations#Using_XUL_panels_as_drag_images" title="en-US/docs/DragDrop/Drag_Operations#Using_XUL_panels_as_drag_images">drag and drop of XUL content</a>.</li>
+ <li>The <code><a href="/es/docs/Mozilla/Tech/XUL/notificationbox" title="notificationbox">notificationbox</a></code> element's <span id="m-appendNotification"><code><a href="https://developer.mozilla.org/es/docs/Mozilla/Tech/XUL/Method/appendNotification">appendNotification</a></code></span> method now lets you specify a callback that gets called for interesting events related to the notification box. Currently, the only event is "removed", which tells you the box has been removed from its window.</li>
+</ul>
+
+<h3 id="JavaScript_code_module_changes">JavaScript code module changes</h3>
+
+<ul>
+ <li><a href="/en-US/docs/JavaScript_code_modules/FileUtils.jsm" title="FileUtils.jsm"><code>FileUtils.jsm</code></a> now has a <code>File</code> constructor that returns an <code><a href="/es/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIFile" title="">nsIFile</a></code> object representing a file specified by its pathname.</li>
+</ul>
+
+<h3 id="Service_changes">Service changes</h3>
+
+<ul>
+ <li>The content preference service now <a href="/en-US/docs/Using_content_preferences#private-browsing" title="en-US/docs/Using_content_preferences#private-browsing">handles private mode browsing</a> (see <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=679784" title="FIXED: nsIContentPrefService should handle private browsing mode">error 679784</a>).</li>
+</ul>
+
+<h3 id="NSPR">NSPR</h3>
+
+<ul>
+ <li>NSPR now has an "append" module, which lets you append new data to the end of an existing log.</li>
+</ul>
+
+<h3 id="Interface_changes">Interface changes</h3>
+
+<h4 id="Removed_interfaces">Removed interfaces</h4>
+
+<ul>
+ <li><code><a href="/es/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIGlobalHistory3" title="">nsIGlobalHistory3</a></code> has been removed during streamlining of the Places and DocShell code.</li>
+</ul>
+
+<h4 id="Miscellaneous_interface_changes">Miscellaneous interface changes</h4>
+
+<ul>
+ <li>The <code><a href="/es/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsISound" title="">nsISound</a></code> interface has a new constant, <code>EVENT_EDITOR_MAX_LEN</code>. The allows for playing the system sound for when more characters than the maximum allowed are typed into a text field. Currently, this is only used on Windows.</li>
+ <li>The <code><a href="/es/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIScriptError2" title="">nsIScriptError2</a></code> interface has new <code>timeStamp</code> and <code>innerWindowID</code> properties; in addition, the <code>initWithWindowID()</code> method now takes an inner window ID instead of an outer window ID.</li>
+ <li>The <code><a href="https://developer.mozilla.org/es/docs/XPCOM_Interface_Reference/nsIBidiKeyboard#haveBidiKeyboards">nsIBidiKeyboard.haveBidiKeyboards</a></code> attribute has been added; this lets you determine if the system has at least one keyboard installed for each direction: left-to-right and right-to-left.</li>
+ <li>The new <code><a href="https://developer.mozilla.org/es/docs/XPCOM_Interface_Reference/nsIEditor#isSelectionEditable">nsIEditor.isSelectionEditable</a></code> attribute lets you determine if the current selection anchor is editable. This helps to support cases where only parts of the document are editable, by letting you see if the current selection is in an editable section.</li>
+ <li>The <code><a href="https://developer.mozilla.org/es/docs/XPCOM_Interface_Reference/nsIBrowserHistory#registerOpenPage()">nsIBrowserHistory.registerOpenPage()</a></code> and <code><a href="https://developer.mozilla.org/es/docs/XPCOM_Interface_Reference/nsIBrowserHistory#unregisterOpenPage()">nsIBrowserHistory.unregisterOpenPage()</a></code> methods have been removed as part of a performance overhaul in the Places system. You can use the corresponding methods in <code><a href="/es/docs/Mozilla/Tech/XPCOM/Reference/Interface/mozIPlacesAutoComplete" title="">mozIPlacesAutoComplete</a></code> instead.</li>
+ <li>The <code><a href="https://developer.mozilla.org/es/docs/XPCOM_Interface_Reference/nsIDOMWindowUtils#wrapDOMFile()">nsIDOMWindowUtils.wrapDOMFile()</a></code> method has been added; this returns a DOM <a href="/es/docs/Web/API/File" title="La interfaz File provee información acerca de los archivos y permite el acceso a su contenido."><code>File</code></a> object for a given <code><a href="/es/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIFile" title="">nsIFile</a></code>.</li>
+ <li>The <code><a href="https://developer.mozilla.org/es/docs/XPCOM_Interface_Reference/nsIChromeFrameMessageManager#removeDelayedFrameScript()">nsIChromeFrameMessageManager.removeDelayedFrameScript()</a></code> method was added to support removing delayed load scripts. Bootstrapped add-ons should use this, at shutdown, to remove any scripts it loaded using <code><a href="https://developer.mozilla.org/es/docs/XPCOM_Interface_Reference/nsIChromeFrameMessageManager#loadFrameScript()">nsIChromeFrameMessageManager.loadFrameScript()</a></code> with the delayed load flag set. This is exposed to add-ons as <code>browser.messageManager.removeDelayedFrameScript()</code>.</li>
+ <li>The <code><a href="/es/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIAppStartup" title="">nsIAppStartup</a></code> interface has a new <code>interrupted</code> attribute, which lets you know if the startup process was interrupted at any point by an interactive prompt. This can be helpful, for example, when timing startups during performance evaluation, to be able to drop numbers from sessions that were interrupted.</li>
+ <li>The <code><a href="/es/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIEditorSpellCheck" title="">nsIEditorSpellCheck</a></code> interface has been revised to support per-site selection of spell checker dictionaries.</li>
+</ul>
+
+<h3 id="IDL_parser">IDL parser</h3>
+
+<p>The IDL parser no longer includes support for the never fully-implemented notion of unique pointers.</p>
+
+<h3 id="Build_system_changes">Build system changes</h3>
+
+<ul>
+ <li>The <code>--enable-application=standalone</code> option for building standalone XPConnect has been removed; it hasn't worked since 2007 anyway.</li>
+ <li>Support for building Necko and Transformiix XSLT standalone has been removed; you can no longer use <code>--enable-application=network</code> or <code>--enable-application=content/xslt</code>.</li>
+ <li>The build system now looks for <code>.mozconfig</code> at <code>$topsrcdir/.mozconfig</code> or <code>$topsrcdir/mozconfig</code>, and nowhere else, unless you override the <code>.mozconfig</code> path using the <code>MOZCONFIG</code> environment variable.</li>
+ <li>The <code>xpidl</code> utility has been replaced in the SDK with <a href="/en-US/docs/XPIDL/pyxpidl" title="pyxpidl">pyxpidl</a>.</li>
+</ul>
+
+<h3 id="Other_changes">Other changes</h3>
+
+<ul>
+ <li>The spell checker no longer has an arbitrary 130-character word-length limit on the length of words it will attempt to spell check. This limit was previously in place to prevent crashes that were occurring in the spell checker, but the underlying bugs have since been fixed.</li>
+ <li>You can now register components to add features to the <a href="/es/docs/Web/API/Window/navigator" title="La documentación acerca de este tema no ha sido escrita todavía . ¡Por favor  considera contribuir !"><code>window.navigator</code></a> object by using the "JavaScript-navigator-property" category. See <a href="/en-US/docs/Developer_Guide/Adding_APIs_to_the_navigator_object" title="en-US/docs/Developer_Guide/Adding APIs to the navigator object">Adding APIs to the navigator object</a> for details and examples.</li>
+</ul>
+
+<h2 id="See_also">See also</h2>
+
+<div><div class="multiColumnList">
+<ul>
+<li><a href="/es/docs/Mozilla/Firefox/Releases/8">Firefox 8 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/7">Firefox 7 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/6">Firefox 6 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/5">Firefox 5 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/4">Firefox 4 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/3.6">Firefox 3.6 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/3.5">Firefox 3.5 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/3">Firefox 3 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/2">Firefox 2 for developers</a></li><li><a href="/es/docs/Mozilla/Firefox/Releases/1.5">Firefox 1.5 for developers</a></li></ul>
+</div></div>
diff --git a/files/es/mozilla/firefox/releases/9/updating_add-ons/index.html b/files/es/mozilla/firefox/releases/9/updating_add-ons/index.html
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+---
+title: Actualizando add-ons para Firefox 9
+slug: Mozilla/Firefox/Releases/9/Updating_add-ons
+translation_of: Mozilla/Firefox/Releases/9/Updating_add-ons
+---
+<div>{{FirefoxSidebar}}</div><p><span id="result_box" lang="es"><span class="hps">Firefox</span> <span class="hps">9</span> <span class="hps">no tiene</span> <span class="hps">una gran cantidad de</span> <span class="hps">cambios</span> <span class="hps">que deberian ser</span><span class="hps"> problemas de compatibilidad</span> <span class="hps">para los desarrolladores</span> <span class="hps">de add-ons.</span> <span class="hps">Sin embargo</span><span>,</span> <span class="hps">hay algunos</span> <span class="hps">elementos</span> <span class="hps">posibles que</span> <span class="hps">puedan ser problematicos</span><span>,</span> <span class="hps">así que vamos</span> <span class="hps">a echar un vistazo</span><span>.</span> </span></p>
+
+<h2 id="¿Es_necesario_hacer_halgo"><span id="result_box" lang="es"><span class="hps">¿</span></span>Es necesario hacer halgo?</h2>
+
+<p><span id="result_box" lang="es"><span class="hps">Si</span> <span class="hps">se distribuye</span> <span class="hps">su</span> <span class="hps">add-on</span> <span class="hps">en</span> <span class="hps">addons.mozilla.org</span> <span class="hps">(AMO</span><span>)</span><span>,</span> <span class="hps">ha sido</span> <span class="hps">verificado</span> <span class="hps">por</span> <span class="hps">una herramienta</span> <span class="hps">de verificación de</span><span class="hps"> compatibilidad</span> <span class="hps">automatizada.</span> <span class="atn hps">Add-</span><span>ons</span> <span class="hps">que</span> <span class="hps">no utilice</span> <span class="hps">API</span> <span class="hps">que cambiaron</span> <span class="hps">en</span> <span class="hps">Firefox 8</span><span>,</span> <span class="hps">y no tienen</span> <span class="hps">componentes</span> <span class="atn hps">binarios (</span><span>que deben</span> <span class="hps">volver a compilar</span> <span class="hps">para cada</span> <span class="hps">versión importante</span> <span class="hps">de Firefox</span><span>)</span><span>,</span> <span class="hps">automáticamente</span> <span class="hps">se han</span> <span class="hps">actualizado</span> <span class="hps">en</span> <span class="hps">AMO</span> <span class="hps">para indicar que</span> <span class="hps">funcionan</span> <span class="hps">en</span> <span class="hps">Firefox</span> <span class="hps">9</span><span>.</span><br>
+ <br>
+ <span class="hps">Así que usted debe</span> <span class="hps">empezar por visitando</span> <span class="hps">AMO</span> <span class="hps">y mirando</span> <span class="hps">para ver</span> <span class="hps">si su</span> add-on</span> requiere trabajo.</p>
+
+<div class="note"><span id="result_box" lang="es"><span class="hps"><strong>Nota</strong>: Aún</span> <span class="hps">deberia probar su</span> <span class="hps">add-on</span> <span class="hps">en</span> <span class="hps">Firefox</span> <span class="hps">9</span><span>,</span> <span class="hps">incluso</span> <span class="hps">si se ha</span> <span class="hps">actualizado</span> <span class="hps">automáticamente.</span> <span class="hps">Hay</span> <span class="hps">casos raros </span><span class="hps">que</span> <span class="hps">no</span> <span class="hps">se pueden detectar</span> <span class="hps">de forma automática</span><span>.</span></span></div>
+
+<div class="almost_half_cell" id="gt-res-content">
+<div dir="ltr" style="zoom: 1;"><span id="result_box" lang="es"><span class="hps">Ya </span><span class="hps">que haya confirmado</span> <span class="hps">que</span><span class="hps"> necesitas hacer cambios</span><span>, vuelva</span> <span class="hps">de nuevo a</span> <span class="hps">esta página y</span> <span class="hps">siga leyendo.</span></span></div>
+
+<div dir="ltr" style="zoom: 1;"> </div>
+</div>
+
+<h2 id="Add-ons_que_estan_bootstrapped_pueden_quitar_scripts_de_carga_retrasada"><span id="result_box" lang="es"><span class="hps">Add-ons que estan</span> <span class="hps">bootstrapped</span> <span class="hps">pueden quitar</span> <span class="hps">scripts </span><span class="hps">de carga</span> <span class="hps">retrasada</span> </span></h2>
+
+<p><span id="result_box" lang="es"><span class="hps">Si su</span> <span class="hps">complemento usa</span> <span class="atn hps">{</span><span class="atn">{</span><span>ifmethod</span> <span class="atn hps">(</span><span class="atn hps">"</span><span>nsIChromeFrameMessageManager</span><span>"</span><span>,</span> <span class="atn hps">"</span><span>loadFrameScript</span><span>"</span><span>)</span><span>}</span><span>}</span> <span class="hps">con el delayed-load</span> <span class="hps">disponido</span><span>, el script</span> <span class="hps">se carga</span> <span class="hps">en todo cuadro</span> <span class="hps">creado a partir</span> <span class="hps">de ese momento</span><span>.</span> <span class="hps">Esto es genial,</span> <span class="hps">excepto que</span> <span class="hps">desde Firefox</span> <span class="hps">9</span><span>,</span> <span class="hps">no había</span> <span class="hps">manera de</span> <span class="hps">detener la carga de</span> el script<span>,</span> <span class="hps">asi que que </span><span class="hps">seguiria ocurriendo</span> <span class="hps">incluso después de que</span> <span class="hps">su</span> <span class="hps">add-on</span> <span class="hps">fue cerrado</span><span>.</span><br>
+ <br>
+ <span class="hps">A partir de</span> <span class="hps">Firefox</span> <span class="hps">9</span><span>, debe llamar a</span> <span class="hps">el nuevo</span> <span class="atn hps">{</span><span class="atn">{</span><span>}</span> <span class="hps">ifmethod</span> <span class="atn hps">(</span><span class="atn hps">"</span><span>nsIChromeFrameMessageManager</span><span>"</span><span>,</span> <span class="atn hps">"</span><span>removeDelayedFrameScript</span><span>"</span><span>)</span><span>}</span> <span class="hps">método para</span> <span class="hps">detener la carga de</span> el script <span class="hps">en los nuevos cuadros</span><span>.</span> <span class="hps">Esto se hace</span> <span class="hps">de esta manera</span><span>, por ejemplo</span><span>:</span></span></p>
+
+<pre>browser.messageManager.removeDelayedFrameScript("chrome://myextension/content/somescript.js");
+</pre>
+
+<h2 id="Interface_changes">Interface changes</h2>
+
+<ul>
+ <li>The {{ interface("nsIURL") }} interface has been changed a bit. The {{ ifattribute("nsIURL", "param") }} attribute was removed, and the {{ ifmethod("nsIURLParser", "parsePath") }} method has two fewer arguments than it did previously.</li>
+ <li>Two methods have been removed from {{ interface("nsIBrowserHistory") }}: <code>registerOpenPage()</code> and <code>unregisterOpenPage()</code>. These methods had been deprecated.</li>
+ <li>The {{ ifmethod("nsIEditorSpellCheck", "saveDefaultDictionary") }} method has been removed as part of supporting per-site spell check settings. Also, {{ ifmethod("nsIEditorSpellCheck", "updateCurrentDictionary") }} no longer takes a parameter.</li>
+ <li>The {{ interface("nsIGlobalHistory3") }} interface has been removed. Its functionality was of limited (if any) use to add-ons, so this shouldn't affect anyone.</li>
+ <li>Several specialized channels' properties attributes have been merged into the base {{ interface("nsIChannel") }} interface. This shouldn't affect compatibility at all, since those interfaces inherit from <code>nsIChannel</code> anyway.</li>
+</ul>
+
+<h2 id="Preference_changes">Preference changes</h2>
+
+<p>The <code>geo.wifi.*</code> preferences no longer have default values, although they're honored if they exist. If your code reads these without handling the case where they don't exist, you need to update your code to handle the exception that gets thrown when they're not present.</p>
+
+<h2 id="XPConnect_changes">XPConnect changes</h2>
+
+<p><code>nodePrincipal</code> and <code>baseURIObject</code> have been moved from <code>nsDOMClassInfo</code> to <code>XrayWrapper</code>. This shouldn't affect many add-ons, since it would only be an issue if they try to access these properties on DOM {{ domxref("Node") }} objects from unprivileged script that have requested XPConnect privileges using <code>enablePrivilege()</code>.</p>
+
+<h2 id="DOM_changes">DOM changes</h2>
+
+<ul>
+ <li>The long-obsolete method <code>Navigator.taintEnabled()</code> has been removed. This hasn't done anything useful in a very long time, but was often used in browser detection scripts, since it was Netscape-specific. Calling this method throws an exception starting in Firefox 9.</li>
+ <li>Event handlers are now implemented as standard IDL interfaces. For most cases, this won't affect you, but <a href="/en/DOM/DOM_event_handlers#Event_handler_changes_in_Firefox_9" title="en/DOM/DOM_event_handlers#Event_handler_changes_in_Firefox_9">there are exceptions</a>.</li>
+</ul>
+
+<h2 id="Other_changes_that_may_affect_binary_compatibility">Other changes that may affect binary compatibility</h2>
+
+<p>These changes are notable in that they may affect binary XPCOM components. These will need rebuilding anyway, since that's required for every major release of Firefox, but could introduce compile-time errors, so they're worth noting in particular.</p>
+
+<ul>
+ <li>The {{ interface("nsIDOMHTMLDocument") }} interface now has a new <code>scripts</code> attribute, which implements the {{ domxref("Document.scripts") }} attribute.</li>
+ <li>The {{ ifmethod("nsIJumpListShortcut", "iconImageUri") }} method has been added, to make it possible to establish favicons on jump list URI entries on Windows.</li>
+</ul>
+
+<h2 id="Theme_changes">Theme changes</h2>
+
+<p>The {{ XULAttr("pending") }} attribute has been added to the {{ XULElem("tab") }} element. If this attribute is present, the tab is in the process of being restored by the session store service. You can use that to style the tab during the restore process. It's worth noting that if the user has turned on the "Don't load tabs until selected" preference, the {{ XULAttr("pending") }} attribute is set on tabs until they get loaded.</p>
+
+<p>Similarly, tabs also now have an {{ XULAttr("unread") }} attribute; this property, if present, indicates that the tab has changed since the last time it was the active tab. You can use this to style tabs differently when they have changed since the last time the user looked at them. This is also present on tabs that have not yet been looked at during the current session.</p>
diff --git a/files/es/mozilla/firefox/releases/index.html b/files/es/mozilla/firefox/releases/index.html
new file mode 100644
index 0000000000..969916af10
--- /dev/null
+++ b/files/es/mozilla/firefox/releases/index.html
@@ -0,0 +1,11 @@
+---
+title: Notas de desarrollo de Firefox
+slug: Mozilla/Firefox/Releases
+tags:
+  - Firefox
+  - TopicStub
+translation_of: Mozilla/Firefox/Releases
+---
+<div>{{FirefoxSidebar}}</div><p>Esta página provee enlaces a artículos de desarrolladores para Firefox X para cada versión de Firefox. Estas notas permiten ver las características añadidas y los errores eliminados en cada versión de Firefox.</p>
+
+<div class="multiColumnList">{{ListSubpages("",1,1,1)}}</div>
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