---
title: Firefox 65 for developers
slug: Mozilla/Firefox/Releases/65
translation_of: Mozilla/Firefox/Releases/65
---
<div>{{FirefoxSidebar}}{{Draft}}</div>

<p class="summary">Este artigo fornece informações sobre as alterações no Firefox 65 que afetarão os desenvolvedores. Firefox 65 é a atual versão <a href="https://www.mozilla.org/en-US/firefox/channel/desktop/#beta" rel="noopener">Nightly do Firefox</a>, e será lançada em <a href="https://wiki.mozilla.org/RapidRelease/Calendar#Future_branch_dates" rel="noopener">29 de Janeiro, 2019</a>.</p>

<h2 id="Mudanças_para_desenvolvedores_da_web">Mudanças para desenvolvedores da web</h2>

<h3 id="Ferramentas_de_desenvolvimento">Ferramentas de desenvolvimento</h3>

<h4 id="Remoções">Remoções</h4>

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

<p><em>No changes.</em></p>

<h4 id="Removals">Removals</h4>

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

<ul>
 <li>The {{cssxref("image-rendering")}} property's <code>crisp-edges</code> value has now been unprefixed ({{bug(1496617)}}).</li>
 <li>A {{cssxref("scrollbar-color")}} value of <code>auto</code> now resolves to <code>auto</code>, rather than two colors ({{bug(1501418)}}).</li>
</ul>

<h4 id="Removals_2">Removals</h4>

<p>The <code>layout.css.shape-outside.enabled</code> pref has been removed; {{cssxref("shape-outside")}}, {{cssxref("shape-margin")}}, and {{cssxref("shape-image-threshold")}} can no longer be disabled ({{bug(1504387)}}).</p>

<h3 id="SVG">SVG</h3>

<p><em>No changes.</em></p>

<h4 id="Removals_3">Removals</h4>

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

<h4 id="Removals_4">Removals</h4>

<h3 id="APIs">APIs</h3>

<p><em>No changes.</em></p>

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

<h4 id="DOM">DOM</h4>

<p>{{domxref("Performance.toJSON()")}} has been exposed to <a href="/en-US/docs/Web/API/Web_Workers_API">Web Workers</a> ({{bug(1504958)}}).</p>

<h4 id="DOM_events">DOM events</h4>

<h4 id="Service_workers">Service workers</h4>

<p>The {{domxref("Response.redirect()")}} method now correctly throws a <code>TypeError</code> if a non-valid URL is specified as the first parameter ({{bug(1503276)}}).</p>

<h4 id="Media_Web_Audio_and_WebRTC">Media, Web Audio, and WebRTC</h4>

<ul>
 <li>Support for <a href="/en-US/docs/Glossary/webp">WebP</a> files has been added (<a class="external external-icon" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1294490" rel="noopener" title="FIXED: Implement WebP image support">bug 1294490</a>).</li>
</ul>

<h4 id="Canvas_and_WebGL">Canvas and WebGL</h4>

<h4 id="Removals_5">Removals</h4>

<ul>
 <li><a href="/en-US/docs/Web/Guide/Events/Mutation_events">Mutation events</a> have been disabled on shadow trees ({{bug(1489858)}}).</li>
 <li>The non-standard {{domxref("MediaStream")}} property <code>currentTime</code> has been removed ({{bug(1502927)}}).</li>
</ul>

<h3 id="Security">Security</h3>

<p><em>No changes.</em></p>

<h4 id="Removals_6">Removals</h4>

<h3 id="Plugins">Plugins</h3>

<p><em>No changes.</em></p>

<h4 id="Removals_7">Removals</h4>

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

<p><em>No changes.</em></p>

<h4 id="Removals_8">Removals</h4>

<h2 id="Changes_for_add-on_developers">Changes for add-on developers</h2>

<h3 id="API_changes">API changes</h3>

<h4 id="Removals_9">Removals</h4>

<h3 id="Manifest_changes">Manifest changes</h3>

<h4 id="Removals_10">Removals</h4>

<h2 id="See_also">See also</h2>

<ul>
 <li><a href="https://www.fxsitecompat.com/en-CA/versions/65/">Site compatibility for Firefox 65</a></li>
</ul>

<h2 id="Older_versions">Older versions</h2>

<p>{{Firefox_for_developers(65)}}</p>