I've used android for years and never knew you could do this. This is one of the things I hate most about all those gestures : there's no way to know about them unless you just try a bunch of random things, or you google for "android browser gestures" or something like that. Give me buttons to do the same things those gestures do! Hide them behing menu if you want, but give me functionality that I can use right now without having to hunt for them on the web.