I follow a lot of the alternate browser engines and am always looking for new ones outside of the big three. You should use your experience to get a career in the browser tech world as we are dangerously close to the Chromium only web.
The future will absolutely not be "How things are today + LLMs"
The paradigm now for software is "build a tool shed/garage/barn/warehouse full of as much capability for as many uses possible" but when LLMs can build you a custom(!) hammer or saw in a few minutes, why go to the shed?