Those who attack Firefox without using it or trying it properly have had a great brainwashing by Gates and co - IE7 is certainly not the be-all and end-all of browsers although Gates would love everyone to think so!
Firefox has excellent features, is really slick to use, and integrates so well with third party apps. There are also so many add-ons for it which expand its use even further. Don't knock what you don't know!! As for inventing / reinventing the wheel, well IE7 certainly isn't the wheel, nor were any of its previous incarnations, and its fantastic to have a CHOICE of software which works ACROSS PLATFORMS and not be completely tied up and attached to Microsoft - there is life beyond Microsoft, really!!!
FIREFOX ROCKS!!!!!!!!!