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> you opened a web page with a facebook's like button and facebook analyzed your browse history How could facebook (or any website) access your browsing histor

• alanfalcon 10y ago
  More like 80% of the web pages you opened included the Facebook Like button, so they have 80% of your browsing history right there.
• jorgemf 10y ago
  I probably was wrong and most probably the user visited the shopping place of the item, which probably would have a facebook javascript library. But there are ways to get information of you browse history: with a facebook like button (other facebook library, or google analytics), which it is in almost all websites, you have the previous web. There were bugs before in browsers that exposed the previous history (sorry I cannot find the link) You could have an extension in your browser that analyzes the whole history. You can also get information by opening an iframe and accessing other site cookies. Doing history sniffing (although unlikely)
• nommm-nommm 10y ago
  Facebook like button is a web beacon. You don't even have to have a Facebook account for them to track you. They don't get it directly from the browser, every time that "like" button is loaded it notes it in a database somewhere. https://en.wikipedia.org/wiki/Web_beacon https://en.wikipedia.org/wiki/Web_beacon
• deleted 10y ago
  [deleted]