In new UI tabs are not highlighted when hovered at the very top of browser in full-screen, making it not allow to change tab. This gap is very small, because miniscule movement of cursor downwards highlights the tab making it possible to change into it. Buttons like "Search tabs", "Minimize" and "Close" can be clicked with cursor being at the very top of the full-screened browser. Hope this issue will be fixed.
Monitor is 1920x1080