Firefox 97.0.1 (deb) reports it is using "wayland" in about:support, and tabs can be dragged just fine.
Firefox 98.0.1 (tar) when run with MOZ_ENABLE_WAYLAND=1, reports it is using "wayland" in about:support and tabs can be dragged just fine.
So it only fails in Firefox snaps that use native Wayland.
Firefox 97.0.1 (deb) reports it is using "wayland" in about:support, and tabs can be dragged just fine.
Firefox 98.0.1 (tar) when run with MOZ_ENABLE_ WAYLAND= 1, reports it is using "wayland" in about:support and tabs can be dragged just fine.
So it only fails in Firefox snaps that use native Wayland.