Facebook, under massive public pressure for years of privacy breaches, won praise earlier this month when it said people would soon be able to “flush your history whenever you want.”

Except the new feature won’t exactly do that.

To understand what’s at work here, you need to know that Facebook collects user information in two ways. First, through info you put into its website and apps. And second — and this is what we’re going to talk about in this article — through information Facebook sucks up about which websites you visit while you’re not on Facebook. It even collects this information from people who don’t have a Facebook account.
— Leer en www.buzzfeed.com/nicolenguyen/facebook-says-youll-soon-be-able-to-flush-your-browsing