Still having trouble with trying to play yahoo games......

So I have tried several things since my last question was posted.....this is what I was told to try first:

In FireFox go up to the "Edit" menu and go to "Preferences". in the
"Contents" tab/button make sure that both "Enable Javascript" and
"Enable Java" are both ticked. It might be worth clicking on the button
beside and have a look around.

So I did and no help than I was told to:

System - Administration - Synaptic Package Manager

it'll ask for your user password, not your SuperUser/Root one. Now use the searc tools to loo for and install adobe flash player also "gnash" should be good. If this doesn't help then try downloading the deb from
http://get.adobe.com/flashplayer/?promoid=BUIGP
just under the big button on that page is a drop-down menu, select Ubuntu from the end of that list.

So does any know what I need to do?? Please help!!