Firefox 45.0

What's new in this version:

New:
- Instant browser tab sharing through Hello
- Tabs synced via Firefox Accounts from other devices are now shown in dropdown area of Awesome Bar when searching
- Synced Tabs button in button bar
- 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
- Web Speech synthesis API
- ES6 Classes

Security fixes:
- 2016-37 Font vulnerabilities in the Graphite 2 library
- 2016-36 Use-after-free during processing of DER encoded keys in NSS
- 2016-35 Buffer overflow during ASN.1 decoding in NSS
- 2016-34 Out-of-bounds read in HTML parser following a failed allocation
- 2016-33 Use-after-free in GetStaticInstance in WebRTC
- 2016-32 WebRTC and LibVPX vulnerabilities found through code inspection
- 2016-31 Memory corruption with malicious NPAPI plugin
- 2016-30 Buffer overflow in Brotli decompression
- 2016-29 Same-origin policy violation using perfomance.getEntries and history navigation with session restore
- 2016-28 Addressbar spoofing though history navigation and Location protocol property
- 2016-27 Use-after-free during XML transformations
- 2016-26 Memory corruption when modifying a file being read by FileReader
- 2016-25 Use-after-free when using multiple WebRTC data channels
- 2016-24 Use-after-free in SetBody
- 2016-23 Use-after-free in HTML5 string parser
- 2016-22 Service Worker Manager out-of-bounds read in Service Worker Manager
- 2016-21 Displayed page address can be overridden
- 2016-20 Memory leak in libstagefright when deleting an array during MP4 processing
- 2016-18 CSP reports fail to strip location information for embedded iframe pages
- 2016-17 Local file overwriting and potential privilege escalation through CSP reports
- 2016-16 Miscellaneous memory safety hazards (rv:45.0 / rv:38.7)