Release Notes

Thunderbird Desktop

Version 78.0.1 | Released July 21, 2020

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.

** Thunderbird version 78.0 is only offered as direct download from and not as an upgrade from Thunderbird version 68 or earlier.** A future release will provide updates from earlier versions.

Add-on support: As of version 78.0, Thunderbird only supports MailExtensions. Your favorite add-ons may not have been updated for compatibility.

At this time, users of the Enigmail Add-on should not update to Thunderbird 78.

OpenPGP functionality for Thunderbird 78 is still work in progress, and is disabled by default in the 78.0.1 release. See the wiki for how to enable and help with testing.

System Requirements: Details

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

What’s New


OpenPGP: Key revocation, extending key expiration, and secret key backup

What’s Fixed


Drag & Drop multiple attachments to macOS Finder created duplicate files


Faceted search date and relevance settings not saved


FileLink attachments included as a link and file when added from a network drive via drag & drop


About Thunderbird dialog keyboard shortcuts did not work


CC'd recipients sometimes displayed collapsed in header pane


Incremental search in contacts sidebar did not always display local results when an LDAP server was also in use


Contacts sidebar search results cleared after removing a contact


OpenPGP: Messages with long Armor Header lines did not display


OpenPGP: Messages containing non-UTF-8 text were not supported


Various UI and theming fixes


Chat: Participants list did not display operator flags

Learn What’s Next

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