Perform the suggestions mentioned in the following articles: * [https://support.mozilla.com/en-US/kb/Template:clearCookiesCache Clear Cookies & Cache] * [[Video or audio does not play]] * Start Firefox in -> [[Safe Mode]] to check if your add-ons/extension are causing the problem. * Also see this article -> [[Troubleshooting extensions and themes]] Check and tell if its working. ------------------------------------------------------------------------------------------------------------- You can also try to clear the Flash Cookies as mentioned in the following articles: -> Flash Website Storage Settings panel: * http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager07.html -> Global Storage Settings Panel: * http://www.macromedia.com/support/documentation/en/flashplayer/help/settings_manager03.html -> Flash Local storage settings Help: * http://www.macromedia.com/support/documentation/en/flashplayer/help/help02.html