I'm not eager for new AI features in Firefox, BUT if you're building them, your approach sounds reasonable (opt-in, full control, etc). I'd like a focus on small local models, like you're already doing for the tab grouping suggestions.
I have to say this looks really bad, Mozilla. You add ToS to your browser, which is an open source application and not a service (having ToS for your services is legit). And you also remove the promise to not sell users data. Then, when users rightfu...