Old Version of Adobe Flash Player

Hello,
I have used YouTube without any trouble for years. Today YouTube was fine when I logged on my computer.
It all clustered and just text when I checked my Inbox, so to see this error: "Hello, you either have JavaScript turned off or an old version of Adobe Flash Player.
Get the latest Flash player." When I went to my channel I updated my flash player and double checked I had JavaScript enabled.
I restarted Firefox when it still did not work.
Is it just me or do any of you gets this problem and to fix it what needs to be done?
