---
title: Firefox 24 for developers
slug: Mozilla/Firefox/Releases/24
translation_of: Mozilla/Firefox/Releases/24
---
<div>{{FirefoxSidebar}}</div><p>{{ draft() }}</p>
<h2 id="Web开发者需要注意的变化">Web开发者需要注意的变化</h2>
<h3 id="Developer_Tools">Developer Tools</h3>
<h3 id="HTML">HTML</h3>
<h3 id="JavaScript">JavaScript</h3>
<ul>
  <li><a href="/zh-CN/docs/Web/JavaScript/Reference/arrow_functions" title="/zh-CN/docs/Web/JavaScript/Reference/arrow_functions">箭头函数</a>不再默认处于严格模式, 除非显示使用 <code>"use strict"</code>. ({{bug(852762)}})</li>
</ul>
<h3 id="DOM">DOM</h3>
<h3 id="MathML">MathML</h3>
<h2 id="相关链接">相关链接</h2>
<ul>
  <li><a href="http://www.mozilla.org/zh-CN/firefox/24.0a2/auroranotes/">Firefox 24 Aurora Notes</a></li>
  <li><a href="/zh-CN/docs/Site_Compatibility_for_Firefox_24">Firefox 24 网站兼容性</a></li>
</ul>
<h3 id="更早版本">更早版本</h3>
<p>{{Firefox_for_developers('23')}}</p>