This is still buggy.
Every time there's a new ubuntu release of Thunderbird (now on 91.3.1) I have to repatch /usr/lib/thunderbird/thunderbird.sh and comment out "export MOZ_ENABLE_WAYLAND=1"
See https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1932328
This is still buggy.
Every time there's a new ubuntu release of Thunderbird (now on 91.3.1) I have to repatch /usr/lib/ thunderbird/ thunderbird. sh and comment out "export MOZ_ENABLE_ WAYLAND= 1"
See https:/ /bugs.launchpad .net/ubuntu/ +source/ thunderbird/ +bug/1932328