I have Internet Explorer 4 on Solaris
I know it was only 21 years ago, but I recently dug out a CD of the first release of Internet Explorer 4 for UNIX (I was on the team at Microsoft) and ran the self-install on a Solaris 4 image using QEMU. IE started right up and looks exactly as it did when we released, doing a decent job with images. As someone has noted, you soon run into the fact that most of the web uses https.