Frame rate question

hi everyone, happy new year! (nearly!)

I’ve stumbled over this website merk design and I was amazed at the speed and smoothness the graphics move at…Now I’ve bumped my frame rate up to 61FPS on the site I’m working on and when I’m running it on my system, its runs great. But on the internet throught the browser using the same computer it runs reeeeeally slow, like it should be 30FPS.

I suppose I’m barking up the wrong tree to get the speed up using FPS, so the question is how do you think he made his so quick and also so **** smooth???