Download video for offline viewing Facebook.
Just like Netflix, apparently Facebook will soon allow to download videos for later offline viewing.
Selecting explicit video playback quality
The FB video player already has the "HD" toggle in the app, but it seems it will start offering explicit resolution options, like YouTube does.
Easier notifications browsing
Two arrows are added to an individual notification's view, so you can easily skip back and forth between notifications, without needing to go back to the notifications top view.