火狐浏览器Mozilla Firefox现已更新至v50.1 正式版，新版启动速度大幅提升，另外FireFox 50添加了对emoji表情的支持、优化了页面查找功能、Ctrl+变迁循环浏览功能，及一些新的偏好设置等等。版本控更新走起！

Firefox 火狐浏览器，拥有最快、最安全的上网体验！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），是一款热门的开源网页浏览器，使用Gecko引擎。它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。

新版变化：

http://mozilla.org/en-US/firefox/notes

2016.12.12 v50.1 Final
Various security fixes

2016.11.30 v50.0.2 Final
Various security fixes

2016.11.15 v50.0 Final
new
Updates to keyboard shortcuts
Set a preference to have Ctrl+Tab cycle through tabs in recently used order
View a page in Reader Mode by using Ctrl+Alt+R (command+alt+r on Mac)
Added option to Find in page that allows users to limit search to whole words only
Added Guarani (gn) locale
Increased availability of WebGL to more than 98 percent of users on Windows 7 and newer
Added download protection for a large number of executable file types on Windows, Mac and Linux
Improved performance for SDK extensions or extensions using the SDK module loader
Playback video on more sites without plugins with WebM EME Support for Widevine on Windows and Mac
fixed
Fixed rendering of dashed and dotted borders with rounded corners (border-radius)
Various security fixes
changed
Added a built-in Emoji set for operating systems without native Emoji fonts (Windows 8.0 and lower and Linux)
Blocked versions of libavcodec older than 54.35.1
developer
Changes for web developers

Mozilla Firefox 50.1 Final 简体中文正式版 x32 / x64位

http://ftp.mozilla.org/pub/firefox/releases/50.1.0/win32/zh-CN/ 

http://ftp.mozilla.org/pub/firefox/releases/50.1.0/win64/zh-CN/

Mozilla Firefox 45.5.1 ESR 简体中文延长支持版 x32 / x64位

火狐浏览器延长支持版本, 简称“ESR”，延长支持版专门为那些无法或不愿每隔六周就升级一次的企业和用户打造的版本Firefox 长期支持版的升级周期为 42 周，而普通 Firefox 的升级周期为 6 周。

http://ftp.mozilla.org/pub/firefox/releases/45.5.1esr/win32/zh-CN/

http://ftp.mozilla.org/pub/firefox/releases/45.5.1esr/win64/zh-CN/