FBPhotoSave allows you to save photos from the Facebook.app directly in your camera roll, at the best quality available. Just keep your finger pressed a few seconds on the photo to let the popup appear: after pressing the 'Confirm' button, you'll find the photo in your camera roll. You can choose to automatically copy the link to the photo to your clipboard (even shortened) via the Settings.app. FBPhotoSave works on all devices supported by the official Facebook app.