> By the way, what's the purpose of the bar at the top? The back button of the browser already does that, even on mobile. Maybe they just want people to get us

> By the way, what's the purpose of the bar at the top? The back button of the browser already does that, even on mobile. Maybe they just want people to get used to this bar on top, and then start A/B testing it with ads and see what reaction they get.