Hi alexrx, most websites are not using plugins for video, although some still use the Flash plugin. * Do you have six blue boxes on this test page: https://www.youtube.com/html5 * Can you give an example of a page where the video doesn't play? Regarding installing and using Flash in Firefox, see: * [[Install the Flash plugin to view videos, animations and games]] * [[Why do I have to click to activate plugins?]]