(In reply to Magnitude from comment #7) > I have the same problem. > > > "WAYLAND_DEBUG=1 thunderbird |& grep app_id" shows me an empty line. > If I change /usr/share/applications/thunderbird.desktop to > .../thunderbird-esr.desktop, Thunderbird loses its icon, but the Wayland > icon is still there. > > > So there must be another solution. Have you closed TB before checking from the command line?