rubbishcorp:

Privacyfix is a simple little Chrome & Firefox Add-On that enables anyone (with one of those browsers) to monitor and adjust Facebook and Google privacy settings. The add-on gives you instant warning signs on the settings that you’ll want to take a look at and enables you go directly to the place where you can change those settings.

If you are in anyway worried about your online privacy (which you probably should be) this is well worth installing.

Here.