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Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

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Please download Firefox ESR (Extended Support Release) to use Firefox.

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Firefox ESR
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.

91.9.0 Firefox ESR

May 3, 2022

Version 91.9.0, first offered to ESR channel users on May 3, 2022

Fixed

  • Various stability, functionality, and security fixes.

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