On a freshly installed laptop with Ubuntu 22.04 LTS (5.15.0-46-generic) and Gnome, I notice a strange behaviour with Firefox (103.0.2).

When it overlaps other windows there's a hidden boundary around the window border, where the mouse is unresponsive if you click the underlying window to bring it in focus and on top. Only when moving further away from the edge of Firefox window does the mouse click work as expected (at least about half a centimeter on my monitors, both main and external).