FBPhotoSave is a tweak available in the Cydia store that allows you to save photos from the official Facebook app for iPhone, iPod touch and iPad. Facebook app by default does not allow you to save photos within the app, but now you can do it using this tweak. The photos are saved in the Photos library of the iPhone.
To save any photo, you have to tap on it and keep your finger on it until the confirming notification pops up. Just tap on ‘confirm’ and your image will be saved in the Photos library.
FBPhotoSave is available at the Cydia Store for $0.99 under ModMyi repo and requires a jailbroken device.
To purchase and download this tweak open Cydia and tap on ‘Search’, now search for FBPhotoSave and from the results click on it.