Release Notes

Thunderbird Desktop

Version 91.6.0 | Released February 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.

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 New


Thunderbird will now offer to send large forwarded attachments via FileLink

What’s Fixed


Partially signed unencrypted messages displayed an incorrect "partially encrypted" notification


Attachments filenames were not sanitized before saving to disk


In the attachment bar, the "Import OpenPGP Key" item displayed for public keys displayed an error and did not import the key


"Open with" attachment dialog did not have a selected radio button option


Various security fixes

Learn What’s Next

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