Strange, it works here in Firefox on Linux using the internal GPU (I don't use primusrun for the browser). Normally I'm the first to notice a particularly heavy website or bad FPS in even pretty old games! Wonder how they managed to make it sluggish on a very expensive GPU but get my crappy setup to run it nicely
Odd. My laptop seemed to do fine with a 'NVIDIA GeForce GTX 1650 Ti Mobile [Discrete]' using CachyOS. It could have been a little smoother but it rendered fine. There were a couple spots where it was a little herky-jerky-laggy that maybe needs optimization.
It choked on my M5 Max MBP w/ 128GB of Unified Memory connected via a TB5 dock over 10GbE directly to my router, which is backed by 5Gbit symmetric fiber. My measured average latency to nasaforce.gov was under 13ms.