Thunderbird Desktop
Version 91.3.0 | Released November 3, 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 the new features in Thunderbird 91, see New in Thunderbird 91.0.
System Requirements: Details
- Windows: Windows 7 or later
- Mac: macOS 10.12 or later
- Linux: GTK+ 3.14 or higher
What’s Fixed
fixed
Default mail headers were set incorrectly when the value contained a colon (:)
fixed
Thunderbird did not send the QUIT command when closing an SMTP connection
fixed
Mail tabs could not be closed using the context menu
fixed
"Print" context menu was still shown when no message pane was displayed
fixed
Windows tray icon did not reappear after restarting Windows Explorer
fixed
Compose window attachment drag and drop fixes
fixed
Various macOS stability improvements
fixed
Drag and Drop area for file attachments on Windows was incorrect
fixed
CardDAV address books without a name did not work
fixed
Thunderbird tried to refresh disabled and manual-only calendars when the network state changed from offline to online
fixed
Various Calendar event dialog fixes
fixed
Various security fixes
Learn What’s Next
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