https://grantwinney.com/websites-requesting-access-to-motion-sensors/ https://grantwinney.com/websites-requesting-access-to-motion... Perhaps this link will he

https://grantwinney.com/websites-requesting-access-to-motion-sensors/ https://grantwinney.com/websites-requesting-access-to-motion... Perhaps this link will help. It looks like websites can request if your browser has access to things like a Gyroscope or Magnetometer, and by default Chrome will block access without your consent. It could be some sort of fingerprinting technique.