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Firefox window moves when making a video full screen

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When I watch a video on youtube and make it full screen then come out, I've noticed my window expands/moves to the left off the screen, it also expands downward too. Tried resetting everything but problem persisted

When I watch a video on youtube and make it full screen then come out, I've noticed my window expands/moves to the left off the screen, it also expands downward too. Tried resetting everything but problem persisted

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