官方版本56.0预计在 2017年09月26日(美国时间) 台湾时间09月27日 更新
https://wiki.mozilla.org/RapidRelease/Calendar#Future_branch_dates
扩充套件的页面，套件名称后方多了显示传统跟没显示，以做区别?!
http://i.imgur.com/zDL95on.jpg
更新日志
https://www.mozilla.org/en-US/firefox/55.0/releasenotes/
new：
Launched Windows support for WebVR, bringing immersive experiences to the
web. See examples and try working demos at Mozilla VR.
Added options that let users optimize recent performance improvements
Setting to enable Hardware VP9 acceleration on Windows 10 Anniversary
Edition for better battery life and lower CPU usage while watching videos
Setting to modify the number of concurrent content processes for
faster page loading and more responsive tab switching
Simplified installation process with a streamlined Windows stub installer
Firefox for Windows 64-bit is now installed by default on 64-bit
systems with at least 2GB of RAM
Full installers with advanced installation options are still available
Improved address bar functionality
Search with any installed one-click search engine directly from the
address bar
Search suggestions appear by default
When entering a hostname (like pinterest.com) in the URL bar, Firefox
resolves to the secure version of the site (https://www.pinterest.com)
instead of the insecure version (http://www.pinterest.com) when possible
Updated Sidebar for bookmarks, history, and synced tabs so it can appear
at the right edge of the window as well as the left
Added support for stereo microphones with WebRTC
Simplified printing from Reader Mode
Updated Firefox for OSX and macOS to allow users to assign custom
keyboard shortcuts to Firefox menu items via System Preferences
Browsing sessions with a high number of tabs are now restored in an
instant
Make screenshots of webpages, and save them locally or upload them to the
cloud. This feature will undergo A/B testing and will not be visible for some
users.
Added Belarusian (be) locale
changed：
Modernized application update UI to be less intrusive and more aligned
with the rest of the browser. Only users who have not restarted their browser
8 days after downloading an update or users who opted out of automatic
updates will see this change.
Firefox does not support downgrades, even though this may have worked in
past versions. Users who install Firefox 55+ and later downgrade to an
earlier version may experience issues with Firefox.
Made the Adobe Flash plugin click-to-activate by default and allowed only
on http:// and https:// URL schemes. (This change will not be visible to all
users immediately. For more information see the Firefox plugin roadmap)
Developer：
Sites that don’t use SSL can no longer access Geolocation APIs to determine
a user’s physical location
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-55.0&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