Such a strange situation: Mozilla skinning a WebKit browser.
Full-screen is obvious, but proven well.
So, you take away the heavy UI chrome we’ve come to expect at the top and bottom of the screen, but then you float a couple, apparently always-on, buttons half-way down the page I’m trying to view? This seems like a bad compromise.
I do very much like the search, enter URL, find a recently visited site and choose a bookmark as a single screen.