Facebook is well known for being a rather liberal user of A/B testing, having seemingly hundreds of tests going on at any one time across its increasingly diversified product line. We've come across a new one, courtesy of Google+ user Fedor von Bock, which sees Facebook testing out a navigation bar at the bottom.
Even though the screenshot below has a bottom navigation bar, it is obviously apparent that the main tab bar at the top remains. For me, this creates a confusion over app hierarchy, ultimately baffling end users by having multiple things that go to different places. The tab bar also does not follow the material guidelines, which say two or less options should use tabs instead, and have icons, not word-based descriptions (obviously Facebook can not do the former, because the tab bar at the top is still there).Read More