Recently Facebook is testing Material Design on their Android Lollipop Application and we received on Nexus 5, Nexus 6. It is beautiful, easy and even fast. Notification bar made now matching colour which is blue, looks like you using bigger screen than before.
Officially Facebook App Screen Shot
When you get an update use see a Big blue floating action button on the left of the corner in Facebook App. But when you click on it you’ll see more functions in it (Write a post, Take a photo, Upload a photo and Where i am) Options.