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.

91.2.0 Firefox ESR

October 5, 2021

Version 91.2.0, first offered to ESR channel users on October 5, 2021

Fixed

Developer

Unresolved

  • For users on macOS Monterey, enabling mouse cursor coloring in the system accessibility preferences can lead to excessive memory usage in Firefox. This problem will be fixed in Firefox 94 due for release on November 2.

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