---
title: Firefox 47 для разработчиков
slug: Mozilla/Firefox/Releases/47
translation_of: Mozilla/Firefox/Releases/47
---
<div>{{FirefoxSidebar}}<br>
<a href="https://www.mozilla.org/firefox/developer/" style="float: right; margin-bottom: 20px; padding: 10px; text-align: center; border-radius: 4px; display: inline-block; background-color: #81BC2E; white-space: nowrap; color: white; text-shadow: 0px 1px 0px rgba(0, 0, 0, 0.25); box-shadow: 0px 1px 0px 0px rgba(0, 0, 0, 0.2), 0px -1px 0px 0px rgba(0, 0, 0, 0.3) inset;">Протестировать последние возможности разработчиков,<br>
и установить Firefox Developer Edition</a>Firefox 47 был выпущен 6 июня 2016 года.<br>
В этой статье перечислены ключевые изменения, которые полезны не только для веб-разработчиков, но и для разработчиков Firefox и Gecko, а также для разработчиков дополнений.</div>

<h2 id="Изменения_для_веб_разработчиков">Изменения для веб разработчиков</h2>

<h3 id="Developer_Tools">Developer Tools</h3>

<ul>
 <li><a href="https://developer.mozilla.org/en-US/docs/Browser_detection_using_the_user_agent">User-agent spoofing</a> from the <a href="https://developer.mozilla.org/en-US/docs/Tools/Responsive_Design_Mode">Responsive mode</a></li>
 <li><a href="https://developer.mozilla.org/en-US/docs/Tools/Memory/Dominators_view#Retaining_Paths_panel">Retaining paths panel</a> in memory tool</li>
 <li><a href="https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker">Service workers</a> and <a href="https://developer.mozilla.org/en-US/docs/Web/API/Push_API">Push API</a> debugging
  <ul>
   <li><a href="https://developer.mozilla.org/en-US/docs/Tools/about:debugging">about:debugging</a> dashboard for workers</li>
   <li>Cached requests are now shown in <a href="https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor">Network Monitor</a></li>
   <li>Support for <a href="https://developer.mozilla.org/en-US/docs/Web/API/Cache">cache storage</a> in <a href="https://developer.mozilla.org/en-US/docs/Tools/Storage_Inspector">Storage Inspector</a></li>
  </ul>
 </li>
 <li>Ability to filter <a href="https://developer.mozilla.org/en-US/docs/Tools/Storage_Inspector">Storage Inspector</a> entries</li>
 <li><a href="https://developer.mozilla.org/en-US/docs/Tools/Web_Console">Console</a> now detects incomplete input and switches multi-line mode</li>
 <li>Updated breakpoint style in <a href="https://developer.mozilla.org/en-US/docs/Tools/Debugger">Debugger</a></li>
 <li>Prevent panels from hiding automatically using the <a href="https://developer.mozilla.org/en-US/docs/Tools/Browser_Toolbox">Browser Toolbox</a>, to aid browser and add-on debugging</li>
 <li><a href="https://developer.mozilla.org/en-US/docs/Tools/Page_Inspector/UI_Tour#Fonts_view">Font inspector</a> has been disabled by default</li>
 <li><a href="https://developer.mozilla.org/en-US/docs/Tools/3D_View">3D view</a> has been removed</li>
 <li>Developer tools theme refresh</li>
 <li>Disable the Font Panel ({{bug(1247723)}}).</li>
</ul>

<h3 id="HTML">HTML</h3>

<p><em>No change.</em></p>

<h3 id="CSS">CSS</h3>

<ul>
 <li>Support for the {{cssxref("::backdrop")}} pseudo-element has been added ({{bug(1064843)}}).</li>
 <li>The case-insensitive modifier <code>i</code> (like in <code>[foo=bar i]</code>) for <a href="/en-US/docs/Web/CSS/Attribute_selectors">attribute selectors</a> has been implemented ({{bug(888190)}}).</li>
 <li>An experimental implementation of CSS Mask Image properties landed. For the moment, this will only be available on Nightly versions of Firefox.y: shorthand version of {{cssxref("mask")}}, as well as {{cssxref("mask-repeat")}}, {{cssxref("mask-position")}}, {{cssxref("mask-size")}} are now available ({{bug(686281)}}).</li>
 <li>The {{cssxref("clip-path")}} property now experimentally supports <code>polygon()</code>, <code>ellipse()</code>, and <code>circle()</code> on HTML elements (does not support <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1246762">inset()</a> and <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1246764">path()</a>), behind the pref <code>layout.css.clip-path-shapes.enabled</code> that defaults to <code>false</code> ({{bug(1075457)}}). Interpolation (and therefore animation) of these values is not yet supported.</li>
 <li>Our still experimental grid implementation has been updated:
  <ul>
   <li>{{cssxref("align-content")}}: <code>normal</code> behaves now as <code>stretch</code> for grid containers ({{bug(1237754)}}).</li>
   <li>The order of column/row values for {{cssxref('grid')}}, {{cssxref('grid-template')}}, and {{cssxref('grid-gap')}} properties has been swapped ({{bug(1251999)}}).</li>
  </ul>
 </li>
 <li>The {{cssxref("@media/display-mode", "display-mode")}} media feature is now supported ({{bug("1104916")}}).</li>
 <li>The value <code>true</code> of {{cssxref("text-align")}} and {{cssxref("text-align-last")}} has been renamed to <code>unsafe</code> ({{bug("1250342")}}).</li>
</ul>

<h3 id="JavaScript">JavaScript</h3>

<ul>
 <li>The new ES2017 {{jsxref("Object.values()")}} and {{jsxref("Object.entries()")}} methods have been implemented ({{bug(1232639)}}).</li>
 <li>The deprecated <a href="/en-US/docs/Archive/Web/Old_Proxy_API">old Proxy API</a> (<code>Proxy.create</code> and <code>Proxy.createFunction</code>) now presents a deprecation warning in the console and will be removed in a future version. Use the standard {{jsxref("Proxy")}} object instead ({{bug(892903)}}).</li>
 <li>Support for the deprecated non-standard <code>flags</code> argument of <code>String.prototype.</code>{{jsxref("String.prototype.match", "match")}}/{{jsxref("String.prototype.search", "search")}}/{{jsxref("String.prototype.replace", "replace")}} has been dropped in non-release builds ({{bug(1245801)}}).</li>
 <li>As per the new ES2016 specification, the {{jsxref("Proxy")}} <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/enumerate">enumerate</a> trap for <code><a href="/en-US/docs/Web/JavaScript/Reference/Statements/for...in">for...in</a></code> statements has been removed ({{bug(1246318)}}).</li>
 <li>The {{jsxref("Array.prototype.indexOf()")}} and {{jsxref("Array.prototype.lastIndexOf()")}} methods (and their {{jsxref("TypedArray")}} equivalents) have been updated to never return <code>-0</code> as per the ECMAScript specification ({{bug(1242043)}}).</li>
</ul>

<h3 id="InterfacesAPIsDOM">Interfaces/APIs/DOM</h3>

<h4 id="DOM_HTML_DOM">DOM &amp; HTML DOM</h4>

<ul>
 <li>The property {{domxref("Document.scrollingElement")}} has been implemented behind the pref <code>dom.document.scrollingElement.enabled</code> that defaults to <code>false</code> ({{bug(1153322)}}).</li>
</ul>

<h4 id="WebGL">WebGL</h4>

<p><em>No change.</em></p>

<h4 id="IndexedDB">IndexedDB</h4>

<ul>
 <li>The {{domxref("IDBKeyRange.includes()")}} method has been implemented ({{bug("1251498")}}).</li>
</ul>

<h4 id="Service_Worker_and_related_APIs">Service Worker and related APIs</h4>

<ul>
 <li>The {{domxref("Request.Request()")}} constructor can now accept a referrer option in its init object ({{bug(1251448)}}).</li>
 <li>The {{domxref("Request.referrerPolicy")}} property is now supported ({{bug(1251872)}}).</li>
 <li>
  <p><a href="/en-US/docs/Web/API/Service_Worker_API">Service workers</a> and <a href="https://developer.mozilla.org/en-US/docs/Web/API/Push_API">Push</a> have been disabled in the <a class="external external-icon" href="https://www.mozilla.org/en-US/firefox/organizations/">Firefox 45 Extended Support Release</a> (ESR) ({{bug(1232029)}}).</p>
 </li>
</ul>

<h4 id="WebRTC">WebRTC</h4>

<ul>
 <li>Support for the {{domxref("RTCIceServer")}} dictionary has been updated in keeping with revisions to the WebGL 1.0 specification by adding support for the {{domxref("RTCIceServer.credentialType", "credentialType")}} property. This property is a string which specifies whether the credential is a password or a token. Currently, Firefox only supports <code>"password"</code>.</li>
</ul>

<h4 id="New_APIs">New APIs</h4>

<p><em>No change.</em></p>

<h4 id="Others">Others</h4>

<ul>
 <li>{{domxref("Cache.add()")}} and {{domxref("Cache.addAll()")}} now raises a <code>TypeError</code> exception if the response status is not in the <code>200</code> range ({{bug(1244764)}}).</li>
 <li>The <a href="/en-US/docs/Mozilla/Firefox_OS/API/App_installation_and_management_APIs">App installation and management APIs</a> (<code>navigator.mozApps.*</code>) are no longer exposed to non-Firefox OS platforms ({{bug("1238576")}}).</li>
 <li><a href="/en-US/docs/Web/API/Web_Crypto_API">Web Crypto API</a> methods can now use the RSA-PSS cryptographic algorithm ({{bug (1191936)}}).</li>
 <li>The <a href="/en-US/docs/Web/API/Permissions_API">Permissions API</a> has had the {{domxref("Permissions.revoke()")}} method added ({{bug("1197461")}}).</li>
 <li>The <a href="/en-US/docs/Web/API/Browser_API">Browser API</a>, which extends the functionality of {{htmlelement("iframe")}}s to allow the creation of frames for displaying web content using HTML — and was previously only available in Firefox OS — is now available to desktop chrome code too ({{bug(1238160)}}).</li>
 <li>The <a href="/en-US/docs/Web/API/notification">Notification API</a>'s {{domxref("Notification.requestPermission()","requestPermission()")}} method has been updated from a callback to a promised-based syntax ({{bug(1241278)}}).</li>
 <li>The <a href="/en-US/docs/Web/API/Fullscreen_API">Fullscreen API</a> has been updated to the latest spec and unprefixed. Some methods have been renamed or have seen their capitalisation changed ({{bug(743198)}}). Note that this is not yet activated by default by behind the <code>full-screen-api.unprefix.enabled</code> preference ({{bug(1268749)}}).</li>
</ul>

<h3 id="AudioVideo">Audio/Video</h3>

<ul>
 <li>Now WAV file with u-law compression encoding can be played({{bug(851530)}}).</li>
 <li><a href="https://www.widevine.com/">Widevine</a> Content Decryption Module provided by Google Inc. is available via the <a href="/en-US/docs/Web/API/Encrypted_Media_Extensions_API">Encrypted Media Extensions API</a> for use with MP4 (only; see {{bug(1257716)}} for EME-with-WebM support) on Windows Vista and later and on Mac OS X enabling migration off Silverlight ({{bug(1265270)}}).</li>
</ul>

<h2 id="HTTP">HTTP</h2>

<p><em>Изменений нет.</em></p>

<h2 id="Сеть">Сеть</h2>

<p><em>Изменений нет.</em></p>

<h2 id="Защита">Защита</h2>

<ul>
 <li>URL with the <code>view-source:</code> protocol don't open the <a href="/en-US/docs/Tools/View_source">View Source</a> tool anymore when used from a Web page ({{bug(1172165)}}).</li>
 <li>The Firefox <a href="https://blog.mozilla.org/futurereleases/2013/09/24/plugin-activation-in-firefox/">click-to-activate plugin whitelist</a> has been removed: only Flash doesn't need to be clicked to be activated ({{bug(1263630)}}).</li>
</ul>

<h2 id="Изменения_для_дополнений_и_Mozilla_developers">Изменения для дополнений и  Mozilla developers</h2>

<h3 id="Interfaces">Interfaces</h3>

<ul>
 <li>The CSS tokenizer is now available in JavaScript for add-ons ({{bug(1152033)}}).</li>
</ul>

<h3 id="FUEL">FUEL</h3>

<p>The <a href="/en-US/docs/Mozilla/Tech/Toolkit_API/FUEL">FUEL</a> JavaScript library, introduced back in Firefox 3, <strong>has been removed</strong>. This library was designed to aid in add-on development and with the introduction of the <a href="/en-US/docs/Mozilla/Add-ons/SDK">Add-on SDK</a> and, now, by <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions">WebExtensions</a> support, is no longer useful. ({{bug(1090880)}})</p>

<h3 id="XUL">XUL</h3>

<p><em>No change.</em></p>

<h3 id="JavaScript_code_modules">JavaScript code modules</h3>

<p><em>No change.</em></p>

<h3 id="XPCOM">XPCOM</h3>

<p><em>No change.</em></p>

<h3 id="Other">Other</h3>

<p><em>No change.</em></p>

<h2 id="Читайте_так_же">Читайте так же</h2>

<ul>
 <li><a href="https://www.fxsitecompat.com/en-US/versions/47">Site Compatibility for Firefox 47</a></li>
</ul>

<h2 id="Старые_версии">Старые версии</h2>

<p>{{Firefox_for_developers(46)}}</p>