Data Selfie - Chrome extension from DATA X on Vimeo.
The extension is developed by the company d4t4x.net and could be downloaded here.
It's bad, really bad, it collect data about the time you spend looking post, link clicked, liked, typed.
Then it deduce what could be your religious and political orientation, shopping preferencies, key word.
When, after some day of usage, the elaborated data started popup i was really badly impressed. I suggest to try it.