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.

Firefox Nightly

June 27, 2022

Version 104.0a1, first offered to Nightly channel users on June 27, 2022

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.


  • Subtitles are now available for Disney+ in Picture-in-Picture.

    Bug 1766273
  • The PDF viewer allows text writing, drawing and signature

    Bug 1779389
  • Firefox now supports re-snapping, it tries to keep the last snap position after any content/layout changes.

    Bug 1530253
All Firefox Nightly downloads