I think you mean "ambient mode". Theater mode is like the halfway point between normal-size an fullscreen-size. As an aside, does anyone know of any good YouT

I think you mean "ambient mode". Theater mode is like the halfway point between normal-size an fullscreen-size. As an aside, does anyone know of any good YouTube settings extensions? I usually open YouTube in incognito tabs to avoid the personalization "features", but this means none of my preferences around ambient mode and "stable volume" are saved.