Have you tried these to see if they setup the URL Bar the way you want?
about:config
1. For setting the URL bar to auto suggest according to only what you type. In "about:config" (type it in your address bar without the quotes for those that don't know) look for:
browser.urlbar.matchOnlyTyped
…and change the value to "True" then restart the browser.
2. For turning the auto suggest off completely, in "about:config" look for:
browser.urlbar.maxRichResults
…and change the value to "0?. Now you'll have a regular old address bar without an auto suggest feature.