写在前面：
安装48.0会使得附加元件重新检查 请记得备份设定档!!!
(检查后我的附加元件是直接全部消失 Firefox的设定也变回默认值)
补充:后来发现桌面有profiles备份 而且有人安装后正常 所以可能是个案!
更新前还是备份一下比较保险 Orz
官方版本49.0预计在 2016年9月13日(美国时间) 台湾时间9月14日 更新
https://zh.wikipedia.org/wiki/Firefox%E7%89%88%E6%9C%AC%E5%8E%86%E5%8F%B2
更新日志
https://www.mozilla.org/en-US/firefox/48.0/releasenotes/
new：
Process separation (e10s) is enabled for some of you. Like it? Let us
know and we'll roll it out to more.
Roar for moar protection against harmful downloads! We've got your back
Add-ons that have not been verified and signed by Mozilla will not load
GNU/Linux fans: Get better Canvas performance with speedy Skia support.
Try saying that three times fast
WebRTC embetterments:
Delay-agnostic AEC enabled
Full duplex for GNU/Linux enabled
ICE Restart & Update is supported
Cloning of MediaStream and MediaStreamTrack is now supported
Searching for something already in your bookmarks or open tabs? We added
super smart icons to let you know
Windows folks: Tab (move buttons) and Shift+F10 (pop-up menus) now behave
as they should in Firefox customization mode
The media parser has been redeveloped using the Rust programming language
Windows 7 systems without Platform Update can now use D3D11 WARP
fixed：
Various security fixes
Improved step debugging on last line of functions
Heyo, Jabra & Logitech C920 webcam users. We fixed those pesky WebRTC
bugs causing frequency distortions. Buh-bye, squeaky voice!
changed：
After version 48, SSE2 CPU extensions are going to be required on Windows
So long to support for 10.6, 10.7 and 10.8. Now we can focus on where
most Mac users are: 10.9. Don't forget to upgrade!
Au revoir to Windows Remote Access Service modem Autodial
developer：
WebExtensions support is now considered as stable
Workers can now use the Web Crypto API
Want to move absolute & fixed positioned elements? (Who doesn't, right?)
Now you can with our geometry editor.
The memory tool now has a tree map view for your debugging pleasure. It's
a little bit of "boo" and a whole lot of "ya."
We're putting the spotlight on the background. Now you can debug
WebExtensions background content scripts and background pages
Content Security Policy (CSP) is now enforced for WebExtensions. (Who's
down with CSP?)
Old and busted: Error Console. New hotness: Browser Console for your
debugging pleasure.
Add-on development just got easier because you can reload them from
about:debugging — because we're all about debugging.
This theme is hot, hot, hot! Say hi to the Firebug theme for Developer
Tools.
Expand network requests from the console panel to view request details in
line, so you can see things in context
unresolved：
On some websites using an important number of cookies, under certain
conditions, this can cause the user to be logged out (1264192)
官方载点:
http://mozilla.com.tw/firefox/download/?os=win&install=full
另一个载点:
http://download.mozilla.org/?product=firefox-48.0&lang=zh-TW&os=win
Mozilla的FTP服务器:
http://ftp.mozilla.org/pub/firefox/releases/
Unbranded版本︰
https://wiki.mozilla.org/Add-ons/Extension_Signing#Unbranded_Builds