Facebook home APK for people who are outside the united states and are unable to download the APK file from playstore. Simply download on your device or move to its storage and install the app using a file manager (Go to settings>Security>Unknown Sources and make sure it is checked).
THIS IS THE UNMODIFIED VERSION, WILL ONLY WORK ON OFFICIALLY SUPPORTED DEVICES
NOTE: I have tried this on custom roms and it appears it is not officially supported
Official devices (list will expand as facebook supports more devices):
HTC One X (HTC One XL (LTE version) not working for all somehow :/, AT&T working)
HTC One X+