Release Notes

Thunderbird Desktop

Version 78.11.0 | Released June 1, 2021

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 of the new features in Thunderbird 78, see New in Thunderbird 78.0.

System Requirements: Details

  • Windows: Windows 7 or later
  • Mac: macOS 10.9 or later
  • Linux: GTK+ 3.14 or higher

What’s Fixed


OpenPGP could not be disabled for an account if a key was previously configured


Recipients were unable to decrypt some messages when the sender had changed the message encryption from OpenPGP to S/MIME


Contacts moved between CardDAV address books were not synced to the new server


CardDAV compatibility fixes for Google Contacts


Folder pane had no clear indication of focus on macOS


Windows theme improvements


Various security fixes

Learn What’s Next

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