Software Update: Mozilla Thunderbird 78.7.1

The Mozilla Foundation has released version 78.7.1 of Thunderbird. Thunderbird is an open source client for email and newsgroups, with features such as support for several mail and news accounts, a spam filter, spell checker, and a customizable appearance. In version 78, a dark mode has been added and other parts of the interface, such as the icons and the screen for composing an email, have also been overhauled. 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. The changelog for this release looks like this:

What’s New

  • CardDAV address books now support OAuth2 and Google Contacts.


  • Thunderbird will no longer allow installation of addons that use legacy APIs


  • Send message button sometimes remained enabled when it should be disabled
  • Pressing command+enter to send a message on macOS did not work
  • OpenPGP: Failed to save attachments that contained binary data after decryption
  • Global search UI fixes
  • Various theme and color fixes to improve ease of use

Version number 78.7.1
Release status Final
Operating systems Windows 7, Linux, macOS, Windows 8, Windows 10
Website Mozilla Foundation
License type Freeware