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Full screen videos/streams on second monitor won't stay full screen while using another window on other monitor

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Whenever I open and then full screen a video or stream of any kind, I am unable to use another window of Firefox while the video/stream maintains full screen. When I click off the video/stream it reverts back to the smaller screen. Is there any way to change this?

Whenever I open and then full screen a video or stream of any kind, I am unable to use another window of Firefox while the video/stream maintains full screen. When I click off the video/stream it reverts back to the smaller screen. Is there any way to change this?

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