Android 4.3 is introducing a new security feature; controlling permissions for each app. It is now possible to modify permissions that each app has.
Note: This feature is probably still a work-in-progress. It seems to be working, but may not be ready for prime time.
This feature lists all the permissions that you provided to the app while installing with an ON – OFF toggle button for control. It also shows when the app used that permission last.
How to control permission for individual app
You can change permissions each app by going to Settings > Apps. However, there is an easy way to do this now. Permission Manager is an app that lets you handle this easily.
If you have Android 4.3 installed at the moment, this is a great app to have. You can say good by to Facebook asking for location access each time you launch the app, and more.
via Android Police