Definitely the feature but I'm sure Gemini is seconds away (figuratively) from invading Chrome and if it has an agent mode itself, it will eat everybody's lunch in the browser space.
In general, I like the idea, but I'm afraid the final implementation will still auto-decide between using the local (for cost saving) and cloud LLM. And potentially outsourcing all your browser-usage LLMs calls to Big Tech like Google is a no-go .