It's no secret that internet browser Firefox has been one of the shining lights of the open source movement, taking market share from Microsoft in a way that Linux hasn't ever quite been able to. Well, in November last year, usage of Internet Explorer dipped below 70% for the first time in a decade, and Firefox's market share rose above 20%. At its peak in 2003, Internet Explorer was running on nearly 94.5% of the world's internet-using computers. Since then, however, usage has steadily declined, due to endless bugs and security vulnerabilities leading to poor public perception of the software.