I went to the Moxilla web page and got the latest Firefox for my new
FC6 but forgot how to get Firefox to use libstd++.so.6 when it looked
for libstd++.so.5 and this you accomplish by yumming libstdc++-33.
I'm fairly sure the lack of libstdc++-33 in FC6 and F7 is a BUG for
both versions.
Karl Larsen