The fix should be in jammy, but is known to not be in impish. Since you are the first person to report that it doesn't seem to be working in jammy, please open a new bug by running:
ubuntu-bug thunderbird or ubuntu-bug gnome-shell -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1932328 Title: Thunderbird under Wayland does not correctly close (or manage) windows To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1932328/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
