Release Notes

Thunderbird Desktop

Version 115.5.1 | Released November 27, 2023

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 help and a quick start on Thunderbird 115, see Thunderbird 115 Supernova FAQ.

For more on all the new features in Thunderbird 115, see What’s New in Thunderbird 115.

System Requirements: Details

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

What’s Fixed


Advanced GnuPG keys may be protected with an unexpected passphrase


OpenPGP signatures rejected due to mismatched signature timestamp now display signature timestamp and clarifying message


Advanced address book search did not return results if display name was left blank


Clicking on attendee when inviting attendees added the attendee twice

Learn What’s Next

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