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When I move my Firefox browser to another monitor and go fullscreen (either F11 or fullscreen Youtube) I can see whatever is behind my window on the top and left edge. This is very annoying and I would like to know if there is a fix. I've tried wiping Firefox from my PC and reinstalling it (deleting appdata information as well) tried different versions and it still appears. Is there any fix?

When I move my Firefox browser to another monitor and go fullscreen (either F11 or fullscreen Youtube) I can see whatever is behind my window on the top and left edge. This is very annoying and I would like to know if there is a fix. I've tried wiping Firefox from my PC and reinstalling it (deleting appdata information as well) tried different versions and it still appears. Is there any fix?

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