November 7, 2025, 4:12pm 1

It scans you on several websites, most notably yelp.com It seems to use javascript and I realize its purpose is to help website users avoid the pain of captchas, but what exactly is it probing & learning about us and our devices? Does anyone know? Their website just kind of speaks in generalities. From their website:

How Device Check Works

Signal Collection: When a request is made, Device Check collects various signals from the user’s device. This includes information about the device’s environment and behavior. 1.

Analysis: The collected signals are analyzed to identify any signs of automation or spoofing. This analysis is done in real-time and does not require the user to complete any challenges, such as CAPTCHAs. 1….

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