THere is a little mistake on 7th Step

7th
cp /usr/lib/flash-plugin/libflashplayer.so /usr/lib64/firefox/plugins

the Flash Plugin on 10.3 SUSE X86_64 it's in:
/usr/lib/browser-plugins/libflashplayer.so


the correct is
7TH
cp /usr/lib/browser-plugins/libflashplayer.so /usr/lib64/firefox/plugins

the other steps are correct