Editors' Note: The Download Now link will prompt a local download of the Firefox extension. To install the extension directly, open the file using your Firefox browser.
Disable the autoplay of the embedded music and movie. The users have 2 modes to choose are disable only the autostart of the embedded media. The users can press the play button of the controller to play it and block the media when loading a page. It will be replaced by a red frame. Press the red frame to load and then play it. This extension can also convert the ie-only tag "bgsound" to "embed", and it can also block Flash media by a costumizable blacklist.