On Nov 11, 1998, I posted the very first screenshot of the NGLayout (now Gecko) Viewer application for Mac to MozillaZine. Today, pretty darn close to 10 years later, I bring you the first screenshot of Chromium's TestShell rendering pages on Mac. It doesn't look like much, but trust me when I tell you a lot of work has gone into making this happen. A lot.
Interestingly, I found the original NGLayout URL using the Google 2001 index that we recently unveiled as part of our 10-year anniversary celebration. You can find more early Gecko screenshots at the Web Archive project.
I've been doing this for too long.