I set up on my Mac a behaviour similar to one I like on PC: a shortcut to move a window to the right or left of screen. It is equivalent to the "Move Window to Left Side on Screen" that can be accessed through hover on the green window button (but much more practical and quicker).
But with Firefox it does not work: the window does go to the side of the screen… then instantly comes back center.
Painful and a reason to change browser for me 😕
