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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.

95.0a1 Firefox Nightly

October 4, 2021

Version 95.0a1, first offered to Nightly channel users on October 4, 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.


  • Avoided always posting a NSEvent to the event loop every time a non-native event is ran which should reduce the CPU usage of the WindowServer process.

    Bug 1690687
  • Firefox now has a new optimized download flow. Instead of prompting every time, files will now download automatically. They can still be opened from the downloads panel with just one click.

    Bug 1732347
  • Locale added: Santali (sat)

    Bug 1734555
  • The Picture-in-Picture toggle button can now be moved to the opposite side of the video from the new context menu option Move Picture-in-Picture Toggle to Left (Right) Side.

    Bug 1680885

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All Firefox Nightly downloads