side note: if I use a larger browser window, e.g. maximized, then the video area gets a bit larger and there's no overlap between the buttons. Also: in one of the times where I tried to repro this, the PiP button didn't appear at all until after I clicked "skip ad". That trivially avoids this problem; though I'm not sure if that was a weird one-off glitch or if that's our intended experience here.
Bug 1777367 Comment 2 Edit History
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side note: if I use a larger browser window, e.g. maximized, then the video area gets a bit larger and there's no overlap between the buttons. Also: in one of the times where I tried to repro this, the PiP button didn't appear at all until after I clicked "skip ad". That trivially avoids this problem, since they can't overlap if they're not on-screen at the same time; though I'm not sure if that was a weird one-off glitch or if that's our intended experience here.