Internet Explorer has continued to lose market share, to 75.88% share in July 2006 from 77.01% in January 2006 and 84.05% in July 2005. That comes off its January 2003 peak of 92.39%, Janco Associates reports. Firefox’s market share rose to 13.71% in July 2006, up from 12.42% in January 2006 and 10.89% in July 2005.