“A user-agent is software that performs communication or interaction with another system on behalf of the user, historically stemming from earlier messaging systems, and literally meaning 'the user’s representative actor'.”

I guess everyone would agree that web browsers would come to our mind when we hear "user-agent" in general context. After years of forward and backward evolution of web extensions, AI powered web browsers inevitably will move forward the meaning of the term "user-agent" and deliver the value it actually promises.

Together with the advance of "browser-use" optimized local LLMs, current M4 powered Macbook Air can provide enough juice to aid users' web browsing needs. I believe soon AI hubs installed at homes, or cloud based private AI inference engines will become much more accessible offerings to help with mobile browsers as well. Overall, I think it's ridiculous to criticise Mozilla for introducing optional AI features on Firefox.