Firefox XWayland - doesn't sync to native refresh rate
Originally reported here: https://github.com/swaywm/sway/issues/4630
Sway XWayland should lead to the application syncing to the display's native refresh rate, it works in various applications. Though Firefox, for whatever reason, is an exception: It syncs to fake 60Hz instead, which look awful on a 75Hz display (and probably also on a 60Hz display, as it wouldn't sync to exact vblank either). Simon Ser assumed that this is either a Firefox or XWayland bug. On native Xorg, Firefox correctly syncs to 75Hz.