Good question. The downvotes are undeserved. The reason is that if it's done in the browser then a person's preferences will apply to every website they use wi

Good question. The downvotes are undeserved. The reason is that if it's done in the browser then a person's preferences will apply to every website they use with that browser. Publishers will not want that as they hope that users will give them more consent than other web sites (I certainly do give some websites full permissions if I like them, others are a 'reject all' and 'object all') Also, your consent preferences are stored under that website's cookie. There is the option of a global cookie but nobody uses it. This cookie data is then sent to everyone involved in the adtech chain (which is causing issues since it can be multiple KB's in size). It's format is described in [0] [0] https://github.com/InteractiveAdvertisingBureau/GDPR-Transparency-and-Consent-Framework/blob/master/TCFv2/IAB%20Tech%20Lab%20-%20Consent%20string%20and%20vendor%20list%20formats%20v2.md https://github.com/InteractiveAdvertisingBureau/GDPR-Transpa...