Release Notes

Thunderbird Desktop

Version 78.8.0 | Released February 23, 2021

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.

For more on all of the new features in Thunderbird 78, see New in Thunderbird 78.0.

System Requirements: Details

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

What’s Fixed

fixed

Importing an address book from a CSV file always reported an error

fixed

Security information for S/MIME messages was not displayed correctly prior to a draft being saved

fixed

Calendar: FileLink UI fixes for Caldav calendars

fixed

Recurring tasks were always marked incomplete; unable to use filters

fixed

Various UI widgets not working

fixed

Dark theme improvements

fixed

Extension manager was missing link to addon support web page

fixed

Various security fixes

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