Answers: There is no way in options but in advance settings you may disable it. For details please visit here :-
http://www.pcmech.com/article/firefox-3-...
Hope this will help you :)
Hi,
Let's do it:
1. In Address bar of FF, type: "about:config" (no "")
- Press "I'll be careful, I promise!"
- In Filter box, type : browser.urlbar.maxRichResults --> double click name below & change value to 0 --> OK
2. Similarly, In filter box, type: browser.urlbar.matchonlytyped --> double click & change value "false" to "true".
3. Tools --> Clear Private Data (Ctrl + Shift + Del) --> stick all & press Clear private Data Now
4. Restart FF.
Good luck