The background centred each approval window on the last focused window, which could be an earlier approval window still open; headless Chrome reports one as 1280x720, the browser refused the resulting position, and the request failed with no window. It now centres only on a browser window, and when the browser refuses a position it asks again without one. In the Chrome suite a test could raise its prompt while the previous test's window was still closing. After a passed test the runner now gives approval windows five seconds to close and fails the test if one is still open; after a failed test it closes them. Model: opus-5-5