If you have an older mac, I would just put in a 128MB chip. It's worth it. Mozilla runs just fine and so does a lot of other software you wouldent expect (even OS X can be made to work on a low end G3!).
In any case, you can use Opera.
That mini-freeze and Netscape 6 are the main reason I left that camp. Zombie8484874 is right in this, netscape does suck ass. However, the Mozilla engine is not quite the same as the Netscape engine, at leas not the version with mini-freez.
I dunno. I love Mozilla! Using RC2, I find that many of the previously incompatible sites I used to visit now work fine. Many of the glitches and bugs have also cleared up.
Zombie84987897, no Joke, you may wanna try Mozilla again once it gets to 1.0 you might be surprised. It's getting alot better!