Well here are the top 10 reasons, and today for the first time, I noticed that in Firefox 3 they have made the location bar even more robust.
A little bit of story before I show the screen-shot… my 2 year old really likes some web pages, specially this one… Abracadabra.
Today, she asked me to play this song, and unfortunately I didn’t have it bookmarked. Now… if you have dealt with tantrum-throwing 2 year olds, you would realize how time could be of importance. She was on the verge of getting super excited about her father not being good in searching for her favorites, but thankfully Firefox 3 helped me save my face 
I just typed in abr and see how smart Firefox has been… Notice that it is now indexing the titles of the page along with the URL. Also notice how it bolds abr in two places… Abracadabra. Really cool!!! And by the way, check out the song (even if you don’t have a kid)
Cheers,
Rahul
Quote of the day: Efficiency is intelligent laziness. - Anonymous