Thunderbird Desktop
Version 140.1.1esr | Released August 5, 2025
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 140, see Thunderbird 140 Eclipse FAQ
For more on all the new features in Thunderbird 140, see What’s New in Thunderbird 140.
System Requirements: Details
- Windows: Windows 10 or later
- Mac: macOS 10.15 or later
- Linux: GTK+ 3.14 or higher
What’s Fixed
fixed
Users with attachments open in tabs saw an error on Thunderbird restart
fixed
Sending from unified or local folder failed if no default account was set
fixed
Delete button could remove attachment instead of message
fixed
Message list scrolled back when returning to mail tab after opening a message
