Comcast adds motion sensing to millions of its newer routers, with a privacy catch

Comcast has added a free Wi-Fi Motion feature to its newer Xfinity gateways (XB7 and newer), turning them into motion sensors that notify users via the Xfinity app when Wi-Fi signal interruptions indicate activity inside the home. The feature is opt-in and can be used for basic security, but Comcast may share motion-detection data with third parties for law-enforcement investigations, disputes, or court orders without further notice.