I haven't managed to get Netsurf-68k to run on my A4000D with Mediator and Radeon 9250.
It just locks up my system.
I had it working once, when I had tried getting AmigaSYS working on it, but decided AmigaSYS was a bit too heavy.
Still need to stick snoopdos on it to see what's going on.
There is also Merlin, but I couldn't get it to do anything except when launched from the shell, it said it was loading things, but didn't actually DO anything, unless I needed to wait longer, but either way, it's still in early beta.