Disable URL autocomplete in the address bar?

With Firefox, when you type a URL in the address bar, a drop-down comes up with suggestions based on browsing history.

Firefox 15 (maybe earlier) has introduced a feature that, in addition to the drop-down actually autocompletes the URL. This is undesirable. I would like to disable the autocomplete while keeping the drop-down with suggestions, as was the case with earlier versions.

Solution 1:

In the browser bar, go to the website about:config. You may need to click a button before you see the table of available properties.

Use the Search field to find a preference called browser.urlbar.autoFill. It will likely be set to true. Set it to false.