Mozilla Firefox 45 Beta 5 已经发布，如果你正在使用 Firefox 45 Beta 版本，将会收到更新提醒。
Mozilla Firefox 45 带来的新特性包括：
New
Instant browser tab sharing through Hello
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
GTK3 integration (GNU/Linux only). Disabled after beta 4
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
Developer Information
HTML5
Push API support, part of Progressive Web Apps
Support delivery of a Content Security Policy (CSP) via a meta tag
ES6 Classes
Web Speech synthesis API
下载地址：https://www.mozilla.org/en-US/firefox/all/
来自:开源中国社区
