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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.

102.0a1 Firefox Nightly

May 2, 2022

Version 102.0a1, first offered to Nightly channel users on May 2, 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.


  • Improved PDF reading in high contrast mode

    Bug 1768821
  • On Linux, Firefox will use Geoclue if available on the system for geolocation.

    Bug 1769664


  • Fix for MFSA 2022-19 included in 2022-05-19 builds and newer.


  • There is now an enterprise policy (StartDownloadsInTempDirectory) and an about:config pref ( that will once again cause Firefox to initially put downloads in (a subfolder of) the OS temp folder, instead of the download folder configured in Firefox. Files opened from the "what should Firefox do with this file" dialog, or set to open in helper applications automatically, will stay in this folder. Files saved (not opened as previously mentioned) will still end up in the Firefox download folder.

    Bug 1738574


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