If AI integration is to happen [...], then this to me seems to be the best way to do it.
Well, to me the best way to do it would be for Mozilla to focus on being the best bare-bone, extendable browser.
Then - if people want an AI in their browser - people should be able to install an AI extension that does these things. It's a bit annoying they're putting random stuff like Pocket, and now an AI in the core of the browser, instead of just making it an option to install extendable