F.B. Purity is a browser extension that lets users customize and clean up their Facebook experience. But according to its creator, it violates Facebook’s terms and conditions. What’s more, the violation may be so egregious that the browser’s creator says, “I am *banned* from using Facebook.” The developer goes on: “They say the reasons for the ban are: ‘Facebook’s terms specifically prohibit interference with the way Facebook is rendered to its users.’” [Source: F.B. Purity]