I should have linked this page earlier: http://johnhaller.com/jh/mozilla/windows_95/
It tells you what you need to know to get Firefox 1.5 to run on Windows 95. In
short, update your system, and ignore the crash that happens on the first start-up,
which is caused by the Import wizard that only appears on the first start-up.
The last Firefox 1.5 update has been released recently, but it will be the last.
So I guess Opera would be the better option.