The "smarter" address bar might be help for some people.if you want to disable follow this.


The first step, in the address bar, enter in
about:config

It should give you some warning. Just disregard it.

In the search bar, enter:
browser.urlbar

Change the browser.urlbar.matchOnlyTyped boolean to True.
(Double click it)

Next, change the browser.urlbar.maxRichResults integer to 0.
(Double click and enter in 0 instead of current number)