> AMD® Ryzen 9 5950x, 32 GB RAM, Linux/Fedora 35, Firefox 97.0, Chromium 96.0.4664.110

Same CPU in my Windows workstation and it's plenty smooth. Not just usable, but smooth. This is at 4K.

Do you have a modern GPU, or something quite old? Or do you have browser hardware acceleration disabled?

If not for your GPU, it's also possible that Linux simply performs significantly worse than Windows for whatever reason.

Yes, I have a recent and powerful GPU with hardware acceleration enabled. I also tried this on my Windows box (i7-9700k, Nvidia GTX 1070), and if anything, it performs a little worse than my Linux box. It's definitely usable. I just have a low tolerance for sluggish software.

Just another data point here: I'm running a relatively high-end workstation on Linux/Fedora 36, and it is quite smooth in Chrome but somewhat sluggish in Firefox.

I worked on a proprietary trading app using flutter for mobile and we had zero issues whilst rendering both ticker prices and charts in real time. How is desktop so different?

5950X, 32 gigs of RAM, Win10, Firefox 98, 3080Ti (if it's GPU accelerated, I didn't look) and it's super jittery for me. It's usable, but it's not smooth at all. Dragging windows around is pretty bad.