Firefox too. The rapid version numbers in web browsers are a nice contrast to the days of "forever IE6" comparability. Web compatibility back then was a nightmare.
Of course we're on the opposite end of that today, where two major browser engines are Chrome and WebKit(Safari), with Gecko often an afterthought.
Of course we're on the opposite end of that today, where two major browser engines are Chrome and WebKit(Safari), with Gecko often an afterthought.