The browser doesn’t matter anymore. So get on with it, and develop something interesting.
M. David’s rant.
I use browsers in this order:

  • Firefox: 60%
  • FeedDemon: 25%
  • MSIE: 10%
  • Opera: 5%

I am likely not alone. FeedDemon is my RSS reader and it is built on MSIE. Firefox is used for browsing, and I don’t do much of that anymore. Opera is for random Web development and other weirdness.
But in five years, browsers will be used infrequently, as desktop information integration over HTTP becomes the norm.