Firefox used to be the cat's meow, but anymore it's become heavy and slow IMO.
There are some lightweight browsers based on the FF (Mozilla) engine such as K-Meleon that zip right along.
http://kmeleon.sourceforge.net/

I use Opera, a Norwegian project.
It's a plush browser with speed.
I like its Speed Dialer which you program with all your favorite places into button form instead of the typical "Favorites" drop-down.
Defaults to tabbed browsing.
Very good, built-in pop up blocker.
Can use plug-ins like FF.
Very customizable, I put a Vista skin on mine.
http://www.opera.com/

Opera Speed Dialer screenshot examples....
https://www.google.com/search?q=opera+sp...024&bih=620
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