Unfortunately, the latest Aurora 7.0a2 build (as of tonight - 12th July, 2011) has enabled a 'feature' as part of the Firefox team's efforts to copy Google Chrome's efforts at being different: they have gone and disabled showing the "http://" (the protocol) part of the URL.
I was dreading the day this would come to my beloved Firefox - but fortunately, Firefox retains the ability to make quick, under-the-hood changes using about:config.
Here's how you go about ensuring your URL bar isn't screwed around with:
- Go to about:config
- Find the value called browser.urlbar.trimURLs
- Double-click and toggle it's value to false