taken. — Since You Arrived Vol. IV ↗

Tra le tante cose che un browser riesce a intercettare del dispositivo che stai utilizzando c’è anche il livello di batteria.

Your browser kept your battery level back. Firefox removed this API entirely in 2016, after researchers proved it could be used to track a visitor across websites without cookies, without consent. The API still exists in the specification. It was simply hidden — from you, and from any page that might ask after it.