WebGPU, WebHID and h.265 are all unsupported on firefox
that said, i still daily drive firefox with mostly no problems, but saying that it can do everything chrome can is just flat out wrong
this is by design mind you, chrome have a big enough market share that they can basically just add whatever they want to the web standards and all other browsers just have to try to keep up. i imagine that’s part of the reason that chromium skins are so widespread