How does your custom AI-built browser challenge the current browser triopoly?

The LLMs are trained on the code of existing browsers. This is essentially a massive process of turning code you don't understand into code you don't understand.

The code details are pretty much all of the details, other than the protocols and standards.

If you understood the codebase of existing browsers (or at least could be confident in making arbitrary changes to existing browsers, perhaps with AI assistance?) then the triopoly wouldn't be threatening because you could just patch out manifestv3 whenever you want.

There is also the problem of people not testing their websites to be compatible with your custom browser. But I would say this is a problem on the protocol level.

I didn't say that they would be successful, just why it's tempting.

Prior to LLMs, creating a browser from scratch seemed like an insurmountable task for a single person. LLMs lower the barrier to entry, and it's a space that is tempting because it would be cool to be the one to create a new browser that people use.