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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.

91.5.1 Firefox ESR

January 27, 2022

Version 91.5.1, first offered to ESR channel users on January 27, 2022

Fixed

  • Fixed an issue that allowed unexpected data to be submitted in some of our search telemetry (bug 1752317)

Developer

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