Can't exit fullscreen on a mobile
Exiting the fullscreen mode is possible with a keyboard or a mouse, but not with a touchscreen as the header bar can't be revealed.
We could reveal the bars when:
- there is any drag movement,
- there is a drag down movement,
- there is a drag down or up on narrow mode as it would match the potion of the header bar, though it may not be a good idea as it could be annoying when scrolling down a page.