Greetings WebKit engineers, I would like to request an official position from the WebKit team on the emerging Idle Detection API <http://wicg.github.io/idle-detection> specification. I am aware that this API was included in a list of APIs <https://webkit.org/tracking-prevention/> which you have decided not to implement due to fingerprinting concerns. I assume that this objection was based on the original explainer provided for this API. Since that list was posted the API has been extended to include a permission that sites must acquire before being granted access to user presence signals. I would like to start a conversation to understand the fingerprinting risks you foresee from this API. [image: Google Logo] Reilly Grant Software Engineer reillyg@google.com Google Chrome