HTML5 Full Screen Web Apps: No browser bars

Question

I am creating a HTML5 web app for mobile devices and was asked to hide the browser nav bar (the back & forward buttons) (typo here prev.). How can I achieve

Answer 1

I know this question is a bit out of date at this point so here is an update:

On Safari for iOS 7+ this solution is great:

The minimal-ui attribute makes the browser hide all the buttons while keeping the taskbar intact.

I have not tested this for android.