http://www.pcworld.com/news/article/0,aid,119369,pg,1,RSS,RSS,00.asp
Between the beginning of December and mid-January, IE's market share dropped 1.5 percent to 90.3 percent, while the Mozilla Project's Firefox browser rose 0.9 percent to a total of 5.0 percent, according to market researcher WebSideStory. Researchers have shown Explorer's market share falling since June, when WebSideStory had its market share at 95.5 percent.