I've been doing the same for Fremantle. Here's a short video:

http://youtu.be/hVAtWl3oUHI

(You'll see me trying to position the cursor directly on the edge. This is because the simulator doesn't support outside swipes. On the device it works when you swipe from the top)

This is also a deb with the UI up to now, but with the QtWebKit backend. The idea is to move to firefox once I'm finished tweaking the details of the UI.

(It has various dependencies like qtdeclarative, qtwebkit, maybe not correctly stated in control, so expect problems in installation)