Firefox Version 45.0

Version 45.0, first offered to Release channel users on March 8, 2016

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
Introduce a new preference (network.dns.blockDotOnion) to allow blocking .onion at the DNS level
Guarani [gn] locale added

Fixed
URLs containing a Unicode-format Internationalized Domain Name (IDN) are now properly redirected
Various security fixes

Changed
Tab Groups (Panorama) feature removed

Developer
Ability to filter snapshot output in memory tool
Fine tune animations by changing the playback rate of animations in the animation-inspector's timeline
DOMContentLoaded and load events shown in the network monitor timeline
Added Negative url filtering for the network monitor
Support for diffing heap snapshots added to the memory tool
Inspector search now matches results from all content in the page, including subframes
List of animated properties and keyframes is now displayed when clicking on an animation in the animation-inspector’s timeline


HTML5
Push API support, part of Progressive Web Applications
Support delivery of a Content Security Policy (CSP) via a meta tag
ES6 Classes

unresolved
On-screen keyboard support was temporarily turned off for Windows 8 and Windows 8.1
Trusteer Rapport is severely impacting the stability of Firefox

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