Facebook recently launched Facebook App For Windows 8.1. You will feel more comfortable with official Facebook app. There are amazing features in Facebook app like, you can chat with your friends at your side with snap view, get updates on live tiles on your screen, get instant notification when your friends respond as like and comment on your posts, you can easily share updates and photos, chat and group conversation, etc. This app currently available for windows 8.1 only.
In official Facebook app there are many new features available and update soon. The new features are tagging, share Charm integration, improved live tiles, touch top bar to scroll to top of feed, set windows profile pic when you upload a new profile pic, download and upload files from messages, download and upload photos from messages, upload photos to a specific album, choose and set your cover photo, choose and set your profile picture, use your profile picture as your Windows account picture, add a secondary tile to go directly to messages (choose this from the app bar in messages view). You can download the app from Windows store directly or else you can go directly by click below link.
Download Official Facebook App From Windows 8.1 Store