I understand that there is no sound in the flash player, do you happen to have the tab in the background? In order to generally troubleshoot issue with sounds in Firefox try this first: *[[What to do if Firefox won't play any sounds]]

Try to clear the Flash local storage and settings. 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