What GPU do you have?

It's a laptop GPU - there's the integrated Intel UHD Graphics 620 card and the dedicated NVIDIA GeForce MX150. Both are pretty old (6-7 years?) but are capable of running most 3D games so I was a bit surprised.

EDIT: P.S. What might help debug is that I have hardware acceleration enabled in the browser, but the GPU is not doing any work on the animejs homepage. For e.g. YouTube, the GPU does a lot of work so I've verified hardware accel works.