Software Update: Mozilla Thunderbird 78.2.1

The Mozilla Foundation has released version 78.2.1 of Thunderbird. Thunderbird is an open source client for e-mail and newsgroups, with features such as support for various mail and news accounts, a spam filter, spell checker and a customizable appearance. In version 78 we find, among other things, a dark mode and other parts of the interface, such as the icons and the screen for composing an email, have been taken care of. Furthermore, the Lightning calendar add-on is now a standard part of the program, there is a new wizard for the first use and only MailExtensions add-ons are supported. An automatic update from 68.x to 78.x is not yet possible, but OpenPGP is now enabled by default. The changelog for this release looks like this:


  • OpenPGP enabled by default
  • OpenPGP: Disabled the use of MD5/SM2/SM3 algorithms


  • OpenPGP: Users with sub-identities were unable to encrypt or sign messages when switching identities
  • OpenPGP message security window did not support dark mode

Version number 78.2.1
Release status Final
Operating systems Windows 7, Linux, macOS, Windows 8, Windows 10
Website Mozilla Foundation
License type Freeware