Thunderbird Desktop
Version 153.3.0esr | Released September 16, 2026
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 153, see Thunderbird 153 Meadow FAQ
For more on all the new features in Thunderbird 153, see What’s New in Thunderbird 153.
System Requirements: Details
What’s Fixed
fixed
Detached attachment links were truncated when folder path contained &
fixed
Save All, Detach All, and Delete All failed after deleting one attachment
fixed
Blank 1970-dated messages could appear from incomplete message file copies
fixed
Forwarded messages could display incorrect encoding
fixed
Manual Get Messages failed after startup until toggling offline mode
fixed
Thunderbird could crash on shutdown while waiting for OAuth2 password entry
