Greasy Fork is available in English.
Automatically sets your Quality & Speed to your desired values, Auto Fullscreen, Auto Pause/Unpause when switching tabs, Auto Unmute.
done, should be working fine (hopefully)
oh and you need to set "PauseOnFocusLoss" to true in the code for it to work (its at the top).
Can you add auto play/pause on tab switching where it pauses when you leave the tab and resumes when you go back.