*This point is often missed in the press but it is interesting to note that Firefox market share in corporate environments appears to be pretty closely tracking with the increased use of Firefox in the general internet population. Firefox use inside many organization often starts with IT, web development teams, and engineering departments and then spreads to other departments and individual users.
Feb. 2010
Findings in this survey indidate 50% of enterprise PC have Firefox installed, and 31% of users run both IE and Firefox.
http://exo-blog.blogspot.com/2010/02/ies-enterprise-resiliency-one.html
Jan. 2010