Using Win98se with Kernel-Ex, I am able to use Firefox 3.x (3.6.28).
Anything above that dont run well.

With all the added security on websites (httpS), I am constantly getting
security errors.

Is it possible to take the files used for security from a newer version
of Firefox and replace them in this same version I use?

I'm stuck using Win98 for reasons I dont want to get into, so I am stuck
using FF 3.6.28. It was working fairly well till aoo this security crap
became the rule. And there are no other browser that work anymore. So
modifying FF is my last resort.