Firefox fans will be facing 2007 with more tranquillity than they did 2006. A year ago, it was clear that Firefox's free ride was about to end: after an astonishing five years of inactivity, Microsoft was finally launching an updated version of Internet Explorer. There seems little doubt that much of Firefox's success is down to the fact that Internet Explorer was so bad, both in terms of the eternal round of security problems and its general technical tiredness (half a decade is a very long time in computing.) Potentially, them, the appearance of Internet Explorer 7 could have marked...