chrome for debian
http://www.google.com/chrome/intl/en/eula_dev.html?dl=unstable_amd64_deb
flash player 10 64bit for linux
http://labs.adobe.com/downloads/flashplayer10.html
FP for chrome
/opt/google/chrome/plugins/libflashplayer.so
FP for firefox
/usr/lib/firefox-addons/plugins/libflashplayer.so
about:plugins