Camino is my internet browser because it has this feature. Try it out and see how great it makes the experience. If browsing my files was this fluid I could navigate with a smile. {left and right swipes should correspond to the buttons labeled back and forward... *note in pathfinder 5.0.0 (495) both actually are labeled back in the tooltips. up and down swipes could be used to navigate up one level in the directory structure and... pull/push down the bottom drawer option).