Copied from Da Gama:
Well, I tested something and: it's the version of Flash and not of your browser. So try the following and it should work: Go to http://portableapps.com/apps/internet/firefox_portable and download the latest version of Firefox Portable (I think there is only the latest version available, so it shouldn't be difficult ;) ) Then go to http://portableapps.com/support/firefox_portable#plugins and use the "easy to use Flash installer for Firefox Portable" (http://portableapps.com/node/15501) and install it in the same folder as your Portable Firefox. As they haven't got the latest Flash version with their installer (But though a quite recent version) it works. Have Fun!
 "Mouse Maze 2 - Harrison Variant"){kind=icon}
 "The Visitor"){kind=icon}
 "Smiley Showdown"){kind=icon}
 "ACTION TURNIP!!!"){kind=icon}
 "Viricide"){kind=icon}
 "Level Up!"){kind=icon}
 "Fold"){kind=icon}