You might be interested in some reviews of Firefox 2, so here are two reviews of Firefox 2 that cover almost everything a person might be interested in. They should help give you a little better idea as to what to expect from Firefox 2.
If you read both of these it would probably be very helpful. The first one gives more praise to Firefox 2 than the second.
Firefox 2 Browser reviews - CNET Reviews
Firefox 2.0 first impressions: So-so upgrade, great browser