Release Notes

Thunderbird Desktop

Version 128.5.2esr | Released December 11, 2024

Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, ask for help, or file a bug in Bugzilla.

For help and a quick start on Thunderbird 128, see Thunderbird 128 Nebula FAQ

For more on all the new features in Thunderbird 128, see What’s New in Thunderbird 128.

System Requirements: Details

  • Windows: Windows 10 or later
  • Mac: macOS 10.15 or later
  • Linux: GTK+ 3.14 or higher

What’s Fixed

fixed

Large virtual folders could be very slow

fixed

Message could disappear after moving from IMAP folder followed by Undo and Redo

fixed

XMPP chat did not display messages sent inside a CDATA element

fixed

Selected calendar day did not move forward at midnight

fixed

Today pane agenda sometimes scrolled for no apparent reason

fixed

CalDAV calendars without offline support could degrade start-up performance

fixed

Visual and UX improvements

Learn What’s Next

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