troducing new limits on how much data is transfered between sites.</span></th></tr><tr><td><div class="tooltipParent">document.referrer<span class="tooltipText">The Referer [sic] request header is a mechanism used by browsers to let a website know where the user is visiting from. This header is inherently tracking users across websites. In recent times, browsers have switched to a policy of trimming a referrer to convey less tracking information, but Referer continues to convey cross-site tracking data by d