alt Hacker NewsIE6 was the most popular browser still during like 2006-2010. There was a point when Opera, Firefox, Chrome were already a thing, and they supported proper standard CSS and HTML, but 90%+ of users still used IE6 and you had to use tricks to support both standard and IE6 fuckery.
I do miss those times.
I'm my school district growing up in the early '00s, every single computer had Netscape Navigator and that is what everyone used.