I have to disagree. I see Mozilla as a big bloated piece of open-source with a spaghetti junction code (which is one of the reasons why no-one has been able to port it to the Amiga). It takes ages to load and its gui is slow even on a new PC. It is also a lot larger than it needs to be.
If I have to endure the horror of surfing on a PC my own preference is Opera, which I find to be much faster, stabler, more compatible, smaller and more powerful. I would prefer this to get ported to OS4 instead of (or as well as) Mozilla. It's commercial but the firm gets most of its money from advertising. Opera is free, but to get rid of the (fairly unintrusive) commercials on the top-right you can buy it.
End plug ;-) But if you really want to support the Amiga buy or register an Amiga browser - or all 3 :-)