Id be interested to hear what your gesture setup for FSfS looks like.
Mine is:
Pull-to-action
Top (swipe down) = Show Bookmarks
Left (swipe right) = Back
Right (swipe left) = New tab
Bottom (swipe up) = Toggle fullscreen
Multitouch
2 finger swipe up = Scroll to top
2 finger swipe down = Scroll to bottom
2 or 3 finger swipe left = Back
2 or 3 finger swipe right = Forward
Taps
Tap-longtap = Show ActionPopUp
Tap-tap-longtap = Toggle fullscreen
Triple-tap = Show tabs
2-finger-double-tap = New tab
3-finger tap = Reload page
Ironically I don't use any swipe gestures lol. I'm using an iPhone, what about you? I hate all iPhone multi finger gestures. I'm constantly on my feet moving and doing multiple things at once so using two hands for gestures is too cumbersome. Plus I have huge hands lol.
So on Fullscreen for Safari, I have single tap and hold set to open the Popup Menu where I have all my commonly used buttons set up and their also set up in certain locations. So on the right side of the menu is where I have go back and go forward, forward tab and back tab, all located right underneath where my right thumb activates the menu. This way I don't have to reach around for the commonly used buttons. You get the idea. Now the only other toggle I have setup is the triple tap to toggle Fullscreen. And that's it! I'm constantly in Fullscreen and I only use my right thumb to control everything. Every other feature is turned off or set to None. Plus I have had poor stability and fluidity when I have a bunch of different swipes and settings configured. This way, it's a fairly lightweight setup and things remain as snappy and quick as stock safari.
Edit: I also love how Yllier added the tiny buttons in the bottom for go back, go forward, and toggle Fullscreen. Those are very handy. And I love how even though when in Fullscreen mode and the status bar is hidden and the space being used by safari, I love how you can still tap the top of the screen to automatically scroll all the way to the top. Very handy.
Edit: lol sorry I remembered one other thing. I do have 3 "pull to" settings configured. Pull to the left is to go back one tab, pull to the right is to go one tab forward, and the top pull to setting is configured for Reload (which I hardly ever use). The bottom one is disabled since I was constantly accidentally engaging it when I didn't want it to be engaged. It was setup to close the tab. Now I just use the close tab button in the Menu Popup. That menu does basically everything I need. It makes using safari in Fullscreen extremely manageable for one handed surfing.