(In reply to Olivier Tilloy from comment #4)
> It looks like the difference might be in using the Wayland backend (default in the beta and edge channels), versus being an XWayland client (default in the stable channel).
>
> Can you switch back to the stable channel, and test again with `MOZ_ENABLE_WAYLAND=1` ?
The snap was previously failing to recognise the gesture with the Wayland backend on the beta channel a few weeks back (switched to beta roughly around the time stable was made to default to XWayland).
Running `MOZ_ENABLE_WAYLAND=1 firefox` when using the stable channel version now recognises the gesture.
(In reply to Olivier Tilloy from comment #4) WAYLAND= 1` ?
> It looks like the difference might be in using the Wayland backend (default in the beta and edge channels), versus being an XWayland client (default in the stable channel).
>
> Can you switch back to the stable channel, and test again with `MOZ_ENABLE_
The snap was previously failing to recognise the gesture with the Wayland backend on the beta channel a few weeks back (switched to beta roughly around the time stable was made to default to XWayland).
Running `MOZ_ENABLE_ WAYLAND= 1 firefox` when using the stable channel version now recognises the gesture.