Hi everyone heres my problem, I am all out of ideas:

About a week ago, both firefox and safari started crashing when I visited sites that use flash. I can't think of anything that I changed to make this happen, it just did.
I thought that maybe it was due to my flash player being out of date so I went to download the newest one but can only get 10.1 as I am running OSX 10.4 on my G5 power PC. When I download this from the archives and install it, the vast majority of sites will not play any videos, and the browser crashes.

So basically, in summary, I downloaded a newer version of flash because my old one was causing firefox to crash, but now the problem is still there and I have absolutely no idea what to do..

I would really appreciate any advice, preferably aimed at someone with very little computer knowledge!!

Thanks in advance..!