What is your operating system & version?
What is your Firefox version?
I don't understand "can't get […] to work" - what exactly do you see instead of the expected Flash content?
[topic moved to Flash Player forum]
Hello, I was having the same issues w/ firefox.
It looked like it wasn't working at all as if the allow flash player content/switch somehow got turned off.
For example, where I'd normally see a game that uses flash is just a blank screen. I'm running on vista home premium.
Turns out I needed to install updates from firefox. Would recommend trying the firefox link in the top left corner going to help & then about firefox and see if you need to update the version.
In the following link, you have information on how to enable Flash Player on Firefox: http://helpx.adobe.com/flash-player/kb/flash-player-games-video-or.html#main_3__Enable_Fla sh_Player_Add_ons__if_you_are_using_Internet_Explorer_8_
After following the steps mentioned there, please see the following page and let us know what you see: http://helpx.adobe.com/flash-player/kb/find-version-flash-player.html