I am currently on windows 11 for ARM (surface laptop 7) and this problem is occurring with both Firefox as well as Firefox developer edition. It's also only happening on my external monitor. I have done some searching and found posts from as long as 4 years ago. The posted solution is to disable any compatibility options but in my case none are selected. This is driving me nuts, does anyone know of a solution? This has to be firefox specific because no other program does this, including other browsers. I have included a screenshot to show what it looks like.