Firefox Release

March 8, 2016

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

We'd also like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox!


  • 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


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

  • Various security fixes


  • 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


Web Platform


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

  • Trusteer Rapport is severely impacting the stability of Firefox

All Firefox downloads