Pt 1 vezi articolul asta de pe lifehacker. Recomand articolul pentru ca mai sunt cateva tweak-uri interesante pe acolo.

# Enter about:config into the address bar and hit Enter.
# Press the "I'll be carefull. I promise!" button. (Because you will be.)
# Enter browser.urlbar.maxRichResults in the Filter field to reach this preference.
# Set it to your desired number of suggestions.