See what landed recently in Firefox Nightly!

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.

Firefox Nightly

November 1, 2021

Version 96.0a1, first offered to Nightly channel users on November 1, 2021

Firefox Nightly gets updated every day and as a consequence, the release notes for the Nightly channel are updated continuously to reflect features that have reached sufficient maturity to benefit from community feedback and bug reports.

Warning: Features listed here may or may not make a final release of Firefox.

In addition to these release notes, you can follow ongoing development on our @FirefoxNightly Twitter account as well as read our Nightly Blog.


  • Significant improvements in noise-suppression and auto-gain-control, slight improvements in echo-cancellation

    Bug 1654112
  • Significantly reduced main thread load

    Bug 1654112
  • Fixes an issue where video intermittently drops SSRC

    Bug 1729110
  • Fixes issue where WebRTC downgrades screen sharing resolution

    Bug 1730748
  • Firefox will enforce the Cookie Policy: Same-Site=lax by default which provides a solid first line of defense against Cross-Site Request Forgery (CSRF) attacks.

    Bug 1617609
All Firefox Nightly downloads