Security company Cequence found traffic matching Meta's Muse agent at more than half of the customers it studied, within two weeks of Muse's September 8 launch — and most of those businesses would not have known. Muse presents itself as an ordinary Chrome browser rather than identifying as an AI agent, so to standard security checks it looks like a person browsing.

Cequence spotted the traffic through behavioral analysis, including a browser update that went from 0% to more than 90% of Muse traffic within days — a sign Meta hosts and updates these cloud browsers centrally. At the median customer, Muse traffic grew nearly sixfold within about two weeks of first appearing.

The finding landed alongside the launch of Cequence's Agent Trust capability, which verifies agents that present an identity and catches the ones that don't. With agentic browsers multiplying, the company argues businesses need both: stop out-of-bounds actions while still letting customers use their services through agents like Muse.