I have managed to reproduce the issue with the upstream build for 78.13.0, downloaded from thunderbird.net, in a fully up-to-date hirsute VM, executed with MOZ_ENABLE_WAYLAND=1.
This rules out a packaging problem. ** Also affects: gnome-shell-extension-ubuntu-dock (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell-extension-ubuntu-dock 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/thunderbird/+bug/1932328/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs