Firefox and IE market shares in December 2007

Firefox held a 17% share of browser usage in December 2007, compared with 76% for Internet Explorer, according to Net Applications, which tracks visitors to about 40,000 Web sites. Firefox has 16% usage share among visitors to 17 business-to-business Web sites, IE’s share at 67% while giving 9% to Netscape, according to Janco Associates.