Release Notes

Thunderbird Desktop

Version 78.2.1 | Released August 29, 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 78.2.1 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. Automatic updates are available for users already running version 78.0 or higher.

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

System Requirements: Details

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

What’s Changed


OpenPGP enabled by default


OpenPGP: Disabled the use of MD5/SM2/SM3 algorithms

What’s Fixed


OpenPGP: Users with sub-identities were unable to encrypt or sign messages when switching identities


OpenPGP message security window did not support dark mode

Learn What’s Next

Thunderbird keeps getting better. Subscribe to our newsletter and follow us on social media to stay informed.