Release Notes

Thunderbird Desktop

Version 78.12.0 | Released July 13, 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

Sending an email containing HTML links with spaces in the URL sometimes resulted in broken links

fixed

Folder Pane display theme fixes for macOS

fixed

Chat account settings did not always save as expected

fixed

RSS feed subscriptions sometimes lost

fixed

Calendar: A parsing error for alarm triggers of type "DURATION" caused sync problems for some users

fixed

Various security fixes

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