Well h-e-double-hockeysticks. I managed to get it running again. Since it demonstrated a repeated pattern of crashing every time it accessed my hard disk (CF card), I tried dragging the entire Netsurf directory to RAM:, assigning it there, and running it from there. Just to see what would happen.
I also ramped way down the crazy numbers for those cache values, window size to 600x400, and depth to 16.
Aside from Google thinking I'm in Poland, and it running completely out of memory when I tried to load amiga.org, it did work. :lol:
Some pics attached.
BTW, I watched it count down to zero, and it did crash again shortly after that "almost out of memory" error. I guess 72MB is not enough when running the application from the ram disk. This proves my theory though that it should run on actual classic hardware, but guess I'd probably need at least 128MB and an '060.

Edit: I wonder if it would be possible to run the application from RAM:, but assign the cache location to a hard disk somewhere?