Since I upgraded to Firefox 4, typing website names or wiki searches in the address box no longer redirects me to those sites, it always sends me to google now.

I used to just type for example "wiki sopranos (tv series)" and it would take me straight to the obvious wiki page, of typing "facebook" would send me straight to the facebook website. Now anything I put in sends me too the google search results page. Is there a setting I can change to fix this?