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What just happened? Google has quietly killed off Project Mariner, one of the first AIs designed to automatically control web browsers to retrieve information, make purchases, and perform other actions – a browser-based AI agent, essentially. But this is unlikely to be considered a failure by the company as many of Mariner's features have been folded into other Google products since its launch.

Google first announced Project Mariner back in December 2024 . An extension for an experimental build of Chrome, Mariner could execute multi-step commands to browse websites, use Google search, retrieve specified information, go shopping, and more.…