Just had a play with Firefox 8. It's certainly fast but they've copied Opera & Chrome with removing the "http:// from the URL bar. I can see the arguments for the change but this feels really wrong to me. I hope there's an about:config tweak somewhere to change it back; even if there is, it's a shame Mozilla have gone down this route.
I don't like the change either. It's one of the many reasons Chrome's UI is terrible. Opera actually implements it pretty well through, since when you click in the location bar the part to the left gets replaced with http://.