Look, this is the most controversial topic I have to face on a regular basis and my opinion is still quite vague.
Firefox (in my opinion) has a nicer looking interface and some nice add-ons lioke the download manager and history and the easier ability to delete temporary files. May people find that the options and preferences settings menu is a little hard to find and use on the windows release.
As far as Spyware and anti-popupo technology goes, I dont see much of a difference between the two. Some people claim that Firefox is better security-wise, but I cant really say I agree with this. Although at release it was easy to claim that "Firefox is soo much less buggy than IE" this was obvious as it was a new product. Recently I remember an issue where 3 bug releases were placed on bugtraq in the short space of a day. Now I'm not saying that this doesn't mean IE has issues, IT DOES! But the way that compatibility, ability to properly view aspx and some issues to do with Style-Sheet and table parsing, leads me to believe that the dominant player (Microsoft) will remain dominant for a while yet!
I also have had issues with libraries not being included in releases when setting up on fedora.
Either way, it will remain to be an open discussion for a while to come, but I agree that the opensource option is going to better suit most people.
I dont think it is ground to discriminate against people though. The same issue arose with Linux vs MS and eventually kids thought it was really "1337" to ostrocise MS for its products, but the actually had no grounds...I refuse to vote for one or the other, but keep numerous browsers installed on my PC.
~Equinox