Well the gestures aren't preset the way they are in "FullScreen for Safari". Personally I always forget how I've set the various one, two and three finger taps and swipes in that add-on.
In Dolphin I use a circle with a cross through it to close a tab, a G to get to google, a square to toggle full screen, an N for a new tab, various small tipped arrows for up, down, back, forward, a counter clockwise circle to reload, etc. I can see then that the app would struggle with letting you drag the website around and activating a gesture. On the other hand the logic that I apply to my gestures makes remembering them simple for my needs.