Is there a package for mozilla plugins? A package such as flashplayer-mozilla or flashplugin-nonfree? This might be needed to get flash working in Firefox (or Epiphany or whatever browser you're using). If you find such a plugin package, install it and see if you can view flash on the Internet.
To see if you have a flash plugin is installed, check under the Tools menu item, under Add-ons, and then Plug-ins, to see (I'm assuming you're using Firefox).