Website animations not working properly in browsers

OS: Ubuntu 20.04 LTS; Graphics: GeForce GTX 1060 6GB/PCle/SSE2;

Some website animations aren’t working properly – they’re often jumpy – whereas they’re smooth on my Windows OS on the same PC. Some sites that rely on movement animations are basically unusable E.g. this site.

I’ve tried using Chrome and Firefox and the result is the same in both browsers. I’ve tried reinstalling Chrome too.