Remember Netscape or how about Mosaic?
Internet Explorer is loosing market share but was once the source of most web innovations: http://www.nczonline.net/blog/2012/08/22/the-innovations-of-internet-explorer/
Mosiac 2.0, lets hear it for grey backgrounds....
I chuckle when developers moan about having to accommodate IE6 and IE7. They're a walk in the park compared to coding for IE4 and Netscape 4.