AwesomeBar/
i found one
addon that is suppose to make the location(URL) bar look like firefox 2, but it isn't compatible with the latest version of firefox 3
so far *below is the best solution to make the location(URL) bar similar to firefox 2, until a updated/new addon is made or Mozilla adds options to change it...
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Type about
:config in address bar
browser.urlbar.maxrichresult change to 50 (max # of visited type-in URLs to display)
browser.urlbar.matchonlytyped change to true
browser.urlbar.autofill change to true
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>or could try this
addon also (Hide pages [bookmarks] that you haven't visited from showing in the AwesomeBar)