Install Firefox 2.0 & Flash Player plug-ins

Downloaded and installed Firefox 2.0. But it cannot be started with the following error message:

/usr/local/firefox/firefox-bin: error while loading shared libraries:
libstdc++.so.5: cannot open shared object file: No such file or directories

Then, have to install libstdc++ using the following command:

$yum install /usr/lib/libstdc++.so.5

Finally, install Flash Player for Firefox. Un-luckly, both the auto and manual installation cannot work on my set. Then, searched from internet and found it work:

$ wget http://macromedia.mplug.org/macromedia-i386.repo
$ sudo cp macromedia-i386.repo /etc/yum.repos.d/
$ sudo yum install flash-plugin


Now, both Firefox and Flash Player work fine. But...actually I don't know the commands used.