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火狐浏览器Firefox38.0正式版安装文件已经出现在官方FTP网站，相信不久就会正式对外发布。

Mozilla Firefox，中文名通常称为“火狐”或“火狐浏览器”（正式缩写为 Fx，非正式缩写为FF），是一个开源网页浏览器，使用Gecko引擎。能够同时支持多种网络标准；可以进行个性化定制；具备出色的性能；能够安装多种扩展程序。

火狐浏览器Firefox38.0本版本更新日志： 
New: New tab-based preferences. 
New: Ruby annotation support. 
New: Base for the next ESR release. 
Changed: autocomplete=off is no longer supported for username/password fields. 
Changed: URL parser avoids doing percent encoding when setting the Fragment part of the URL, and percent decoding when getting the Fragment in line with the URL spec. 
Changed: RegExp.prototype.source now returns “(?:)” instead of the empty string for empty regular expressions. 
Changed: Improved page load times via speculative connection warmup. 
HTML5: WebSocket now available in Web Workers. 
HTML5: BroadcastChannel API implemented. 
HTML5: Implemented srcset attribute and element for responsive images. 
HTML5: Implemented DOM3 Events KeyboardEvent.code. 
HTML5: Mac OS X: Implemented a subset of the Media Source Extensions (MSE) API to allow native HTML5 playback on YouTube. 
HTML5: Implemented Encrypted Media Extensions (EME) API to support encrypted HTML5 video/audio playback (Windows Vista or later only). 
HTML5: Automatically download Adobe Primetime Content Decryption Module (CDM) for DRM playback through EME (Windows Vista or later only). 
Developer: Optimized-out variables are now visible in Debugger UI. 
Developer: XMLHttpRequest logs in the web console are now visually labeled and can be filtered separately from regular network requests. 
Developer: WebRTC now has multistream and renegotiation support. 
Developer: copy command added to console. 
Fixed: Various security fixes.

火狐浏览器支持Windows XP、Vista、Win7、Win8、Win8.1，Win10等平台，38.8MB，简体中文版。

Firefox火狐浏览器38.0下载