the browser that runs like a snail on a 1.6Ghz Linux PC. I can't imagine how slow it'll be on a 600Mhz Sam.
No idea what the issue might be with your Linux PC, but I was just running Firefox usably on an old 233mhz subnotebook (albeit version 2.0) for the past few days, and the newest runs like a dream on my 1.6GHz Atom netbooks. 600mhz is more than enough for everything but heavy Flash junk like Youtube.
or at least tease people about it and get their hopes up that it's actually something impressive.
Porting something as big as Firefox to AmigaOS sounds pretty impressive to me. I'll agree OWB does work fine on 4.1, but on a next to abandoned platform like Amiga, better to let the developers do what makes them happy/attracts attention/whatever, who knows, maybe they'll pick up a few new tricks along the way and decide to port OpenOffice or something.
