If I recall correctly, the main selling point of Firefox AI is that it's offline by default, which means that it doesn't rack up your token bill and doesn't expose your data.
No, Firefox out of the box has an AI side panel with options to use Claude. Most machines won't run a good enough local model so they don't default to that.
Firefox does several other things with AI too, and many of them locally, e.g. suggesting tab group names, suggesting other tabs to add to existing groups, auto-generating alt texts for images pasted into edited PDFs – each supported by a dedicated local model!
You can see which ones your Firefox installation has already fetched and their purpose on about:addons.
On top of that, current mobile versions (and weirdly enough only mobile versions) can now also summarize articles using Apple Intelligence (where available) or Mozilla-hosted remote inference: https://blog.mozilla.org/en/firefox/shake-to-summarize/