Mozilla Firefox 45 Beta 1 今日发布，本次更新最大改进在于Linux版本整合GTK3，并优化了同步系统，Hello功能已经可以共享当前的标签页，在访问多国文字的域名后缀系统的不兼容问题也已经被彻底解决，标签组功能也在这一版本中被删除。
下载地址:
https://ftp.mozilla.org/pub/firefox/releases/45.0b1/
Firefox 45 Beta
Version 45.0 beta, first offered to Beta channel users on January 27, 2016
New
Instant browser tab sharing through Hello
GTK3 integration (GNU/Linux only)
Synced Tabs button in button bar
Tabs synced via Firefox Accounts from other devices are now shown in dropdown area of Awesome Bar when searching
Introduce a new preference (network.dns.blockDotOnion) to allow blocking .onion at the DNS level
Fixed
URLs containing a Unicode-format Internationalized Domain Name (IDN) are now properly redirected
Changed
Tab Groups (Panorama) feature removed
Developer
Inspector search now matches results from all content in the page, including subframes
Ability to filter snapshot output in memory tool
Support for diffing heap snapshots added to the memory tool
Added Negative url filtering for the network monitor
DOMContentLoaded and load events shown in the network monitor timeline
List of animated properties and keyframes is now displayed when clicking on an animation in the animation-inspector’s timeline
Fine tune animations by changing the playback rate of animations in the animation-inspector's timeline
HTML5
Push API support, part of Progressive Web Apps
Support delivery of a Content Security Policy (CSP) via a meta tag
Web Speech synthesis API