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Firefox Release Notes

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release.

92.0 Firefox Release

September 7, 2021

Version 92.0, first offered to Release channel users on September 7, 2021

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


  • More secure connections: Firefox can now automatically upgrade to HTTPS using HTTPS RR as Alt-Svc headers.

  • Full-range color levels are now supported for video playback on many systems.

  • Mac users can now access the macOS share options from the Firefox File menu.

  • Support for images containing ICC v4 profiles is enabled on macOS.


  • Firefox performance with screen readers and other accessibility tools is no longer severely degraded if Mozilla Thunderbird is installed or updated after Firefox.

  • macOS VoiceOver now correctly reports buttons and links marked as ‘expanded’ using the aria-expanded attribute.

  • An open alert in a tab no longer causes performance issues in other tabs using the same process.

  • Various security fixes


  • Canonical is now building the official Firefox snap. It's also now available on two additional architectures, ARMhf and ARM64.

  • The bookmark toolbar menus on macOS now follow Firefox visual styles.

  • Certificate error pages have been redesigned for a better user experience.

  • Continuing work to restructure Firefox’s JavaScript memory management to be more performant and use less memory.


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