See what’s new in Firefox!

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

Various security fixes

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

Tab Groups (Panorama) feature removed

[UPDATE: 3/23/2016] Firefox Hello v1.1 improvements:

• We’ve made it easier to connect with others in FIrefox Hello by sharing a link to your Hello room using email or Facebook direct messaging
• You can also easily stop and restart tab sharing whenever you want
• Once you connect, you’ll see your room participants’ mouse cursor and they’ll see yours

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

Push API support, part of Progressive Web Applications

Support delivery of a Content Security Policy (CSP) via a meta tag

ES6 Classes

On-screen keyboard support was temporarily turned off for Windows 8 and Windows 8.1

Trusteer Rapport is severely impacting the stability of Firefox