It now has a uniform menu tray that pops out from the left side that looks the same across all screen sizes, which allows users to navigate to any part of Facebook without needing togo back to the homepage -- meaning it's easier than ever to get sucked down a rabbit hole of baby pictures, witty comments, likes and pokes.
Many shopping sites use this technique legitimately so repeat visitors can go straight to the department they are interested in rather than go through the homepage or by clicking links in a menu.