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The autonomous browser agent Google introduced at I/O 2025 is now more. Its technology is being absorbed into the Gemini API and Gemini Agent.

Google Labs

Google has shut down Project Mariner, the autonomous web browsing agent it debuted at I/O last year. The tool, which could navigate Chrome, fill out forms, search listings, and book travel by taking screenshots and visually recognizing page elements, is no longer available. Its landing page now shows a notice with the shutdown date listed as May 4, 2026.

A browser agent that saw what you saw

Project Mariner was Google DeepMind’s attempt to build an AI agent that interacted with websites the way a person would. Rather than reading page data directly, it processed screenshots in real time to identify buttons, text fields, and links, then clicked and typed on a user’s behalf.…