Yes.
"It has already become the de facto standard for learning."
Maybe.
"AI in browsers is inevitable."
Why. How does that follow. It seems like ChatGPT and Gemini are already working fine, what does the integration add?
If a global LLM becomes standard, I'd want to plug in my own local model or disable it entirely, but I don't think Microsoft nor Apple are going to open up their operating systems and make it easy to do that any time soon. The option to granularly use your own models is a plus to me in that situation.
Even at work, have seen few junior developers use AI browsers to attend mandatory compliance courses and complete quizzes. Not necessarily a good thing but AI browsers may win in the end and it might be too late for Firefox.