Thunderbird Desktop
Version 140.0.1esr | Released July 10, 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
What's New page for 140esr was not displayed
fixed
Status bar showed previously detached attachment when hovering over a new one
fixed
URLs for hovered links in status bar could be immediately overwritten
fixed
NNTP message pane did not show network error page when network was lost
fixed
Inserting a link into an HTML mail did not work as expected
fixed
Autoconfig no longer handled 'No such host' errors correctly
fixed
Thunderbird could crash on startup for POP3
Known Issues
unresolved
Passwords are not remembered in 32-bit MAPI use without a compose window
