Sadly Bernd and Artur only seem to be interested in hacking the SDL frontend, which wasn't really designed as a full desktop browser.
And unfortunately they use ixemul instead of libnix, making the final product not as nice as it could be. Do you know if OS4 netsurf could be recompiled with clib2 instead of newlib? Since there's a clib2 version for m68k perhaps it makes the job easier.
How would libnix and clib2 compare on m68k? which one would be better? I have noticed that Damato is using clib2 for its MUI m68k classes.