Firefox 20 for developers

  • Revision slug: Firefox_20_for_developers
  • Revision title: Firefox 20 for developers
  • Revision id: 336151
  • Created:
  • Creator: teoli
  • Is current revision? No
  • Comment

Revision Content

{{ draft() }}

{{ ReleaseChannelInfo("20", "20", "April 2013", "Nightly") }}

Want to help document Firefox 20? See the list of bugs that need to be written about and pitch in!

Changes for Web developers

HTML

  • Support for the {{htmlattrxref("download", "a") }} attribute on the {{HTMLElement("a")}} and {{HTMLElement("area")}} element has been added.  ({{bug("676619")}})

JavaScript

  • Support for the Weakmap.prototype.clear() method, recently added to the Harmony (EcmaScript 6) draft proposal has been added ({{bug("814562")}}).

CSS

  • CSS Flexbox is now available by default, without the need to flip an about:config preference.

DOM

  •  

Changes for add-on and Mozilla developers

  •  

See also

Older versions

{{Firefox_for_developers('19')}}

Revision Source

<p>{{ draft() }}</p>
<p>{{ ReleaseChannelInfo("20", "20", "April 2013", "Nightly") }}</p>
<p>Want to help document Firefox 20? See the <a class="external" href="http://beta.elchi3.de/doctracker/#list=fx&amp;version=20.0">list of bugs that need to be written about</a> and pitch in!</p>
<h2 id="Changes_for_Web_developers">Changes for Web developers</h2>
<h3 id="HTML">HTML</h3>
<ul>
  <li>Support for the {{htmlattrxref("download", "a") }} attribute on the {{HTMLElement("a")}} and {{HTMLElement("area")}} element has been added.&nbsp; ({{bug("676619")}})</li>
</ul>
<h3 id="JavaScript">JavaScript</h3>
<ul>
  <li>Support for the <code><a href="/en-US/docs/JavaScript/Reference/Global_Objects/WeakMap" title="/en-US/docs/JavaScript/Reference/Global_Objects/WeakMap">Weakmap</a>.prototype.clear()</code> method, recently added to the Harmony (EcmaScript 6) draft proposal has been added ({{bug("814562")}}).</li>
</ul>
<h3 id="CSS">CSS</h3>
<ul>
  <li><a href="/en-US/docs/CSS/Using_CSS_flexible_boxes" title="/en-US/docs/CSS/Using_CSS_flexible_boxes">CSS Flexbox</a> is now available by default, without the need to flip an about:config preference.</li>
</ul>
<h3 id="DOM">DOM</h3>
<ul>
  <li>&nbsp;</li>
</ul>
<h2 id="Changes_for_add-on_and_Mozilla_developers">Changes for add-on and Mozilla developers</h2>
<ul>
  <li>&nbsp;</li>
</ul>
<h2 id="See_also">See also</h2>
<ul>
  <li><a href="http://www.mozilla.org/en-US/firefox/20.0a1/nightlynotes/">Firefox&nbsp;20 Aurora Release Notes</a></li>
  <li><a href="/en-US/docs/Site_Compatibility_for_Firefox_20">Site Compatibility for Firefox 20</a></li>
</ul>
<h3 id="Older_versions">Older versions</h3>
<p>{{Firefox_for_developers('19')}}</p>
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