Aims to enhance privacy, but advertisers aren't happy
Letter sent to 53 major sites
'The proposed API appears to maintain the status quo of inappropriate surveillance on the web', says W3C's Technical Architecture Group
Bing.com stored cookies on visitors' machines without their consent
Both companies have three months to adapt their methods for cookies rejection
Many users agree to cookies simply to get around pop-ups: the opposite of meaningful or informed consent
Google advertising rivals are concerned that Google will continue to gather user data for itself via loopholes while they would lose the data-gathering tool