I do this with my xreal glasses sometimes when washing dishes or whatever. Connected to phone in my pocket with a desktop mode, set a black wallpaper, and drag the video into a corner.
It's nice for situations like that, where you're doing something with your hands and can't reasonably place a screen in a way where you wouldn't have to constantly strain your neck to look at it.
is that something you know for sure? or has Google quietly complied with similar requests, without making a statement like Mozilla has here?