Without a prebuilt action
Your agent can still open pages, inspect the screen, click controls, type into fields, and read results. That is the universal path, and it works anywhere the browser itself works.
BrowserMan works on any website. Prebuilt actions help your agent use fewer tokens, move faster, and complete common operations more reliably.
Prebuilt actions are optional accelerators, not a limitation. BrowserMan still works on websites we have never mapped before.
Your agent can still open pages, inspect the screen, click controls, type into fields, and read results. That is the universal path, and it works anywhere the browser itself works.
BrowserMan can hand the agent a more structured path for a known operation. That lowers wasted steps, lowers token cost, and usually improves consistency.
Your real browser, your real sessions, your delegated approval flow, and your ability to revoke access from the dashboard. Prebuilt actions change efficiency, not the trust model.