Hides the mouse cursor in the Twitch video player in fullscreen mode.
Doesn't work with extension overlays.
- (2020-02-25) De Rossi: works for me. edit: not working anymore.
- (2019-12-23) common legacy: Works great! Does what twitch apparently can't do on its own
- (2019-02-07) Tobias Freibeuter: Doesn't do anything