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
this kind of comment just reminds me of how people used to complain about distortion on electric guitars when it was initially discovered/invented/popularized