I just got a x86 tablet, and it works great with GNOME(Wayland), having pretty good touch support, except for on Firefox. I can't get multi-touch gestures to work, nor touch scrolling. I've tried environment variables(MOZ_ENABLE_WAYLAND=1,MOZ_USE_XINPUT2=1), but that didn't change anything. I've also had a look in about:config and couldn't tell what options would change my experience. It should be noted that I have WebGL disabled, but I don't forsee that changing anything. I also see under about:support that the Window Protocol is xwayland, and I'm wondering if that changed anything aswell(the protocol doesn't change even with environment variables).