Software Update: Mozilla Thunderbird 78.6.1

The Mozilla Foundation has released version 78.6.1 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, 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:

changes

  • MailExtensions: browserAction, composeAction, and messageDisplayAction toolbar buttons now support label and default_label properties

Fixes

  • Running a quicksearch that returned no results did not offer to re-run as a global search
  • Message search toolbar fixes
  • Very long subject lines distorted the message compose and display windows, making them unusable
  • Compose window: Recipient addresses that had not yet been autocompleted were lost when clicking Send button
  • Compose window: New message is no longer marked as “changed” just from tabbing out of the recipient field without editing anything
  • Account autodiscover fixes when using MS Exchange servers
  • LDAP address book stability fix
  • Messages with invalid vcard attachments were not marked as read when viewed in the preview window
  • Chat: Could not add TLS certificate exceptions for XMPP connections
  • Calendar: System timezone was not always properly detected
  • Calendar: Descriptions were sometimes blank when editing a single occurrence of a repeating event
  • Various printing bug fixes
  • Visual consistency and theme improvements

Version number 78.6.1
Release status Final
Operating systems Windows 7, Linux, macOS, Windows 8, Windows 10
Website Mozilla Foundation
Download https://www.thunderbird.net/en-US/thunderbird/all/
License type GPL
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