挨踢路

继Firefox 20.0b3正式版发布之后，Mozilla今天又发布了Firefox 20.0 beta4版本，支持了全新的下载窗口。

以下是更新列表和下载地址：

What's New

NEW Per-window Private Browsing

Known Issues 

NEW New download experience

NEW Ability to close hanging plugins, without the browser hanging

NEW Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config

CHANGED Continued performance improvements around common browser tasks (page loads, downloads, shutdown, etc.)

DEVELOPER Continued implementation of draft ECMAScript 6 - clear() and Math.imul

DEVELOPER New JavaScript Profiler tool

HTML5 <canvas> now supports blend modes

HTML5 Various <audio> and <video> improvements

HTML5 getUserMedia implemented for web access to the user's camera and microphone (with user permission)

FIXED Details button on Crash Reporter (793972)

FIXED Unity plugin doesn't display in HiDPI mode (829284)

Unresolved If you try to start Firefox using a locked profile, it will crash (see 573369)

Unresolved Mootools 1.2.x incompatible with Firefox 18 and newer.Fixed in Mootools 1.3 and newer (see 789036)

Unresolved Some function keys may not work when pressed (see 833719) Unresolved on v19 Resolved in v21

官方CDN下载：

20.0b4   http://download.cdn.mozilla.net/pub/mozilla.org/firefox/releases/20.0b4/win32/zh-CN/

19.0.2 http://download.cdn.mozilla.net/pub/mozilla.org/firefox/releases/19.0.2/win32/zh-CN/