Release Notes

Thunderbird Desktop

Version 91.5.0 | Released January 11, 2022

Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla.

For more on all the new features in Thunderbird 91, see New in Thunderbird 91.0.

System Requirements: Details

  • Windows: Windows 7 or later
  • Mac: macOS 10.12 or later
  • Linux: GTK+ 3.14 or higher

What’s Fixed

fixed

RSS keyword labels without a configured color were illegible

fixed

Thunderbird "about:" dialog did not identify third-party repackaged distributions such as Flatpaks

fixed

Various security fixes

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