Check your plugins are uptodate! *http://www.mozilla.org/en-US/plugincheck/ Type '''about:addons''' in URL and Goto Plugins * Check all the plugins are "Always Active" Somewhere on the page right click, go to view page info > permissions and make sure that adobe flash content is allowed to play on that domain. Flash in Protected mode occurs issues too *http://kb.mozillazine.org/Flash#Flash_Protected_Mode_issues_on_Windows_Vista_and_above *http://forums.adobe.com/thread/1018071