it would be far better if F6 would toogle the address bar rather then just showing it, leaving hiding to mouse clicks or the ESC key. also,in fullscreen,it is annoying that when address bar shows,the upper panel pops up too. while at it,you could also add the page search (F3) in firefox flying but keep the 'start searching when i start typing' thing on, for us who love it that way. it is a neat idea as this is the only thing remaining at the bottom of the screen now that the status bar is gone and addon bar moved next to tabs with firefox4 ui fixer..
i would post this on the discussion forum but it sais that topic doesn't exist and i currently have no mail account to send directly..
It works great so far. My recommendation is that you would make the three things that it does optional. I would like to only use the search and url popup capabilities. I don't care for getting rid of the navigation. bar. Until then, this is too unsightly for me.