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Firefox Nightly
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.

96.0a1 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.


  • We’ve made significant improvements in noise-suppression and auto-gain-control as well as slight improvements in echo-cancellation to provide you with a better overall experience.

    Bug 1654112
  • We’ve also 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
  • Fixes video quality degradation in certain sites

    Bug 1690832


  • Firefox for Linux changes shortcut key for "Select All" from Alt-a to Ctrl-a for solving web-compat and avoiding conflict with access keys. If you want to keep using Emacs like key bindings, e.g., you configured your GTK settings to use Ctrl-a as a shortcut key for moving caret to beginning of a line, you need to change ui.key.textcontrol.prefer_native_key_bindings_over_builtin_shortcut_key_definitions and ui.key.use_select_all_in_single_line_editor from about:config. These prefs are currently disabled by default but would be enabled by default in a future release.

    Bug 1376091

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