Browser Bridge Protocol

const ws = new WebSocket("ws://127.0.0.1:8765/ws");
ws.addEventListener("open", () => {
  ws.send(JSON.stringify({ type: "register", client: "extension" }));
});
ws.addEventListener("message", (e) => console.log(JSON.parse(e.data)));

import asyncio, json, websockets

async def main():
    async with websockets.connect("ws://127.0.0.1:8765/ws") as ws:
        print(await ws.recv())  # "connected" welcome
        await ws.send(json.dumps({"type": "start_session", "goal": "open example.com"}))
        print(await ws.recv())

asyncio.run(main())