I think your opening claim is disingenious at best. Your list of features contains numerous references to service pack 2, which was released a month and a half ago, a far cry from your claim of three years. The IE released then clearly didn't have those features.
Your information regarding customization is laughable - an article regarding changing the homepage hardly compares to the numerous extensions Firefox offers. Moreover, the point is that it OFFERS them - it allows the users the choice to customize their browser as they see fit, and aren't saddled with a myriad of features they have no interest in using.
The link regarding security is similarly misleading - reading the article indicates that IE was equally vulnerable to a similar exploit. Moreover, the number of exploits IE is vulnerable to is exponentially more than Mozilla or Firefox, and the time taken to fix these exploits doesn't compare.
I think there are SEVERAL compelling reasons to switch, but more importantly, I'd really like to see people who sling accusations of deceptive marketing be a little bit more honest in their own critiques.