fPrivacy is a new Chrome plug-in that gives you control over which Facebook app permissions you want to allow, and which you want to block. Truth is, many apps ask for more information than they need, and fPrivacy helps keep apps from running wild.
Once you download the extension from the Google Chrome web store, any time you go to authorize a Facebook app, a grey bar will pop up above the authorization box that lets you uncheck any permissions you’re not comfortable with. After you click “Update” and “Allow,” apps will be blocked from accessing those parts of your profile.
The one obstacle you may encounter is that some permissions are necessary for certain apps to function. In these cases, as you use the apps, you’ll probably be prompted to authorize the mandatory permissions.
As for those apps you added before downloading fPrivacy, you can easily remove the non-essential permissions. Just go to your Account Settings, click Apps, edit an app and click the “X” or “remove” by the optional permission you want to take away. You can also remove the app altogether.