Facebook blocks Google Chrome extension for exporting friends

Facebook Friend Exporter is a Chrome extension developed by Mohamed Mansour, an open source software engineer, that lets you grab all the information about your Facebook friends so you can import them elsewhere. Because it got popular recently, Facebook noticed and began to block the extension.

Mansour says that Facebook removed emails from their mobile site, which were critical to the original design of his extension. He told me that the company had implemented a throttling mechanism: if you visit any friend page five times in a short period of time, the email field is removed.