Mozilla beats Internet explorer
I think I'll start using Mozilla as my default web browser. The biggest single factor influencing my decision is the fact that Mozilla allows you to change the font sizes. Internet Explorer does not. On my laptop computer, the normal size fonts are small, while the small size fonts are almost unreadable.
There are other factors too. For example, Mozilla allows you to stop the animations. Some animations are too distracting, making it difficult to read the text on the page.
On a philosophical level, Mozilla is not so beholden to corporate (that is, Microsoft's) interests.
Why privacy really does matter
I had a scary thought about privacy. Since there are other countries that are not subject to the laws of the United States (or subject to the laws of other industrialized nations for that matter), it's conceivable that a company could try to make money selling your personal information. They could operate out of some place in the world where they couldn't be touched by the laws of the U.S. They could make money selling searches to anyone who would pay for it. It's even conceivable, that once your most sensitive personal information escapes outside of responsible control, it could be forever out there being passed around in a black market.