[kibwen]

Also interesting: according to that graph, as of June 2012, Firefox's major stable release at last surpassed IE's major stable release--just a few months shy of the 10-year anniversary of the release of Firefox 0.1.

EDIT: Ha, actually, drilling back further, looks like that's not true at all: Firefox's major release has surpassed IE9 for a while now. I was misled by IE9's slow adoption curve.