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#11
I also only use 5 gestures(first thing I do is delete the rest), so they are intuitive, no discipline necessary.
Flick up, brings me to the top of page, flick down, to the bottom. Flick left -back, Flick right - forward. Flick up-down reload, but while this one is programmed I usually forget so essentially, there is nothing to remember, just a flick in the direction I want to go.
These seem to be the most common activities and they are much faster with a simple flick than they are with keyboard or browser button press. Used for a bit they are addictive. I wouldn't use a browser that couldn't do this. Even Chrome gestures add on scrolls to the bottom slowly irritates me. Opera/Firefox, flick and you are there.