Release Notes

Thunderbird Desktop

Version 115.2.1 | Released September 11, 2023

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.

Thunderbird version 115 is only offered as direct download from and not as an upgrade from Thunderbird version 102 or earlier. A future release will provide updates from earlier versions.

For more on all the new features in Thunderbird 115, see What’s New in Thunderbird 115.

System Requirements: Details

  • Windows: Windows 7 or later
  • Mac: macOS 10.12 or later
  • Linux: GTK+ 3.14 or higher

What’s New


Column separators are now shown between all columns in tree view

What’s Fixed


Crash reporter did not work in Thunderbird Flatpak


New mail notification always opened message in message pane, even if pane was disabled


After moving an IMAP message to another folder, the incorrect message was selected in the message list


Adding a tag to an IMAP message opened in a tab failed


Junk/Spam folders were not always shown in Unified Folders mode


Middle-clicking a folder or message did not open it in a background tab, as in previous versions


Settings tab visual improvements: Advanced Fonts dialog, Section headers hidden behind search box


Various visual and style fixes

Learn What’s Next

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