As others have mentioned, these agentic capabilities are fully achievable within a Chrome Extension.
In fact, we built one, rtrvr.ai that has even better Web Agent performance than Open AI's Operator with human assistant and 7x faster than leading competitor: https://www.rtrvr.ai/blog/web-bench-results
Your Accessibility Tree requirement is a poor excuse, rather you should build up an agent from a first principles understanding of DOM interactions.
A browser is a SERIOUS security risk, you need a dedicated team to just pull in the latest security patches that Google pushes to Chromium or your users are sitting ducks to exploits and hacks...
In fact, we built one, rtrvr.ai that has even better Web Agent performance than Open AI's Operator with human assistant and 7x faster than leading competitor: https://www.rtrvr.ai/blog/web-bench-results
Your Accessibility Tree requirement is a poor excuse, rather you should build up an agent from a first principles understanding of DOM interactions.
A browser is a SERIOUS security risk, you need a dedicated team to just pull in the latest security patches that Google pushes to Chromium or your users are sitting ducks to exploits and hacks...