Browser Use

Codex browser | Browser Harness

Let Codexuse your browser.

Codex clicks, types and reads pages in your own Chrome, logged in as you.

Try it in the cloud
PromptPlay a full game against Stockfish level 7 on Lichess. Read the live board, make each move in the browser, and report the result.

When a tool is missing,
the agent writes it.

  1. agent: wants to pick a date
  2. agent_helpers.py → helper missing
  3. agent writes itagent_helpers.py + pick_date()
  4. date picked

Questions

Do I need a Chrome extension?

No. Paste one prompt into Codex and it sets itself up. Chrome asks once for permission.

How do I know which tab Codex is using?

The tab Codex controls gets a 🐴 at the start of its title. It works in the background, so the tab you are looking at stays yours.

What does it cost?

Nothing. Browser Harness is open source under MIT, and using your own Chrome is free. Cloud browsers are $0.02 per browser-hour if you want them.

You will never use
the browser again.

Try it in the cloud