Fullscreen mode on Webcam
The fullscreen button is blocked by close window button. When removed the close windows button (closing-x) in dev tools it's still not possible to switch to fullscreen.
Happened with several webcameras - for example Trutnov Czech republic, or Adršpach Czech republic.
@Dufko this is not a bug, this is done on purpose because the fullscreen button does not work. Therefore it is covered by the button.