Confirming this bug persists in TB 91 under Pop!_OS 21.10. A fix for this was apparently [committed](https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2027) several months ago, but (per [this comment](https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1932328/comments/64)) users will not see it until updating to gnome 40.6.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
