I’ve tried to ignore IE but sadly it has a large user base and is the browser of choice for ‘enterprisey-type establishments’. I love FireFox and I am addicted to numerous extensions (FireBug, Screenshot, Web Developer Toolbar, Del.icio.us, Selenium, etc). I don’t think a day goes by, where I don’t keenly try to sell FireFox to an IE user. …But in reality I too as a developer need to test in IE and therefor must at least have it installed. At least IE now supports add-ons - the Web Developer toolbar might come in handy.