I'm on a Framework running Arch with a 165 Hz external monitor, using Firefox, and it feels sluggish to me. It's usable, but feels like the performance I'd expect from a website. For example, grabbing a window and thrashing it around, it noticeably lags behind my mouse cursor. Resizing a window from the top is pretty bumpy. It lags behind the mouse and the repainting stutters.
You should try brave or chrome it's pretty smooth for me on a 5 year old Ryzen 1 system with 32GB memory. I don't even remember what my AMD card is, it was a mediocre card 5 years ago whatever it is.
