Release Notes

Thunderbird Desktop

Version 91.7.0 | Released March 8, 2022

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

System Requirements: Details

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

What’s Changed


Thunderbird will use the first occurrence of headers that should only appear once

What’s Fixed


Auto-complete incorrectly changed a pasted email address to the primary address of a contact


Attachments with filename extensions that were not registered in MIME types could not be opened


Copy/Cut/Paste actions not working in Thunderbird Preferences


Improved screen reader support of displayed message headers


Various security fixes

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