A lot of changes are rolling out on Facebook, and the Apps area didn't escape this remodel. Currently, an app only needs you to authorize permission once. After permission is given, it can post and share activity on Facebook on your behalf without approval. If you want to check up on what an app has access to, or are tired of sharing what game you're playing, here's how to adjust those settings:
Step 1: In Facebook, click the small arrow near your name in the upper-right-hand corner and choose Privacy Settings.
Step 2: Scroll down to Apps and Web sites and click on Edit Settings off to the right.
Step 3: If the app you want to adjust is in the recently used list, click on it to edit settings. If not, click on the Edit Settings button to see all apps.
Step 4: Find the app you want to adjust permissions for in the list that loads, and click Edit.
Step 5: Look over all of the areas that the app can access on your Facebook. On some apps, you will be able to revoke certain permissions.
Step 6: Scroll to App activity privacy; select the people who can see activity from the app you're currently working with in the pop-up list.
If you don't want to share app activity with anyone on Facebook, you'll need to perform one more step.
(Optional) Step 7: Choose Custom from the list, and in the new window select Only me from the drop-down options.