You have the answer. I used to use Netscape 3.04 with OS 7.5.5 and it worked really well. Version 4.02 and 4.03 are a bit new for that OS. You can probably still find it at Netscape.com in their archives. Any version 3.x will work well. Mac browsers don't run as fast as what you're accustomed to but they do ok. If you have enough ram you can create a ram disk (in the memory control panel) and set Netscape's cache to that. That way you'll be caching to ram instead of writing to HD.
Yeah, I'm new here ;-) :-)
Glad to be here.
Bob
Amiga A4000D, etc.