Someone from forum.atari-home.de (Ektus) got netsurf running with MagiC (including network access via MagiC-net + a little bit symlink tweaking...).
If you have MagiCnet working ( does it exist for MagicMac? ) you should also be able to use it with netsurf. ( MagicNet seems to be compatible to the MiNT Network stack...)