For an end user, Firefox was great. But the wide prevalence of IE meant that * Sometimes sites worked only in IE or broke subtly in other browsers. The subtle

For an end user, Firefox was great. But the wide prevalence of IE meant that * Sometimes sites worked only in IE or broke subtly in other browsers. The subtle breaking could be layout differences or functionality not available/working because the developers used IE specific technology/javascript * Developers had to code for the lowest common denominator - IE. It really held back web applications * Debugging any errors in IE was a royal pain