Installing Flash Player in Internet Explorer doesn't install Flash Player in Firefox. I think this could be the issue here.
Could you please access the following page using Firefox and try installing Flash Player: http://get.adobe.com/flashplayer/
I had already done that but I did it again and still have the same results, nothing is displayed when i go to that verification web page.
Is the plugin (Shockwave Flash) enabled in Firefox?
Yes, it is enabled and it displays the correct version.