

I remember making one of those.
It had a faux URL bar at the top of both the left and right frame and used a little JavaScript to turn each side into its own functioning browser window. This was long before browser tabs were a mainstream thing. At the time, relatively small 4:3 or 5:4 ratio monitors were the norm, and I couldn’t bear the skinny page rendering at each side, so I gave it up as a failed experiment.
And yes I did open it inside itself. The loaded pages were even more ridiculously skinny.

Neurons firing. I recognise one of those blobs as being oddly similar to the real-world administrative area where I grew up, not that I learned the actual shape of it until a few years ago. The blobs around it don’t match though.