I would have posted this about five minutes ago, but it took me that long to pick myself up off the floor.
That’s Chimera, an xaw-based browser dating all the way back to 1993. Just typing that makes my jaw drop again. I had it in my head that there were no browsers between GTK1.2 and the console, and then, wouldn’t you know it, some wicked Archer comes up with a browser that needs only the X widget set to display Web pages.
Even better, there’s now a page on Wikipedia for it, along with a brief set of installation instructions for Arch Linux. Fantastico!
I’ll have to spend a few hours seeing if it will glob together in Ubuntu, and then possibly see about putting together a strictly X-based desktop. Oooh! Yes! This is what I call fun … ! 
Gotta love your enthusiasm!
It is too bad this has not been maintained. Firefox is the only application that I use that requires GTK and it annoys me to add all those dependencies for just one application.
Reminds me of mosaic, the first web browser I remember having used around 14 years ago. Before that it was console only. But most of the interesting stuff was in gopher, anyway
Mosaic and ancient Netscape should do.