You are downloading the Plus for Facebook XAP file v188.8.131.52 for Windows Phone. Plus for Facebook is a free and useful Social app: Plus for Facebook, a unofficial Facebook client with full features: - update status, like, comment, view photo, ... - view photo in full ... You can now download the offline XAP file to install & try it.
Download Locations for Plus for Facebook 184.108.40.206 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Plus for Facebook XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.