If you would rather not have Firefox display autocomplete results at all. This method does not work on Mac.
- In the Location bar, enter about:config
- Search for the preference browser.urlbar.maxRichResults.
- Double-click the browser.urlbar.maxRichResults preference and enter a value of -0.
- Close Firefox.
- Start Firefox again.
Now when you type in the Location bar, no list of results will be shown.