I really hate when music or movies start up on a Web site when I did not ask them to. It is rude for my browser to think I want to listen to or watch this stuff without asking first. Well, I have a Firefox extension that will teach your browser some manners.
The Stop Autoplay extension for Firefox disable the autoplay of the embedded music and movie (mp3, wma, wmv, avi, mpg, and more). Are you locked out of hearing or seeing it then? No! The users can press the play button of the controller to play it. Now this is the way the Web was suppose to be.