I've noticed that when i open a video on fullscreen (e.g., on Youtube) it causes some bugs. The first bug happens when I open a video on fullscreen with the browser in the regular (not fullscreen) mode (see image 1). When the video is open, some clickable icons appear on the top left corner. The first icon when clicked opens up a new tab. Also you can click some areas above those icons. They open up the main menu and the menu with addons that I have on my navigation bar. The second bug happens when I open a video on fullscreen with the browser in fullscreen mode. In this case icons do not appear. But when I close the video the navigation bar changes (see images 2 and 3): some buttons disappear, they move to a new menu with all the extra buttons that don't fit on the navigation bar (for some reason). When I exit the fullscreen mode of the browser everything comes back to its place. Does anybody else have those problems? What can be the cause of this? I'd really appreciate any help on this matter.