> Sites don't get access to any random old cookie, they get access to cookies they themselves have set before (more or less). Well, kinda. Remember Facebook ar

> Sites don't get access to any random old cookie, they get access to cookies they themselves have set before (more or less). Well, kinda. Remember Facebook are able to track people around the web using their famous embedded Like button. This happens regardless of whether the button is clicked. This is unfortunately under-reported, so I'll make do with linking to, of all places, BuzzFeed: https://www.buzzfeednews.com/article/alexkantrowitz/heres-how-facebook-tracks-you-when-youre-not-on-facebook https://www.buzzfeednews.com/article/alexkantrowitz/heres-ho...