Regarding AI *in* Firefox, this has brought us a built-in translator that does not outsource the work to the cloud. That's amazingly good work. I'd love to see the browser do more of that kind of thing. https://www.mozilla.org/en-US/firefox/features/translate/
@bert_hubert I ended up turning that off again after trying it since it got introduced, since it kept popping up when I didn't need it, and, AFAICT, only works on a site level, instead of, say, selected text?
I may have missed something, but it felt very unintuitive.