The falling-out panels in the full screen mode

[ChromiumIQ]

You can assign it to a mouse gesture.

You did not understand a sense of my sentence. Read at first and try to understand. And yes here gestures? There is no such operation "Show — to Hide Panels in the Full Screen Mode". The sentence consists that in case of cursor movement to upper bound of the screen in the full screen mode panels fall out. Set Firefox and look as it works.