

You can see the MIME types and file extensions that are handled by your installed plugins in the about:plugins list. Unlike Internet Explorer, Mozilla browsers will only use a plugin to play the media content if the plugin lists that MIME type otherwise, you will get a "missing plugin alert".

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These articles include information about some common browser plugins and how to set them up:Įach plugin contains a list of file extensions and MIME types, (also called Internet media types) which it will play. You may already have the correct media players installed that can play audio and video files, but this does not guarantee that you have the plugins needed when the audio or video is embedded inside the web page itself.

(See bug 799318 for plans to support playback of additional media formats in future versions of Firefox, using the HTML5 video and audio elements.) Except for certain open media content, current Mozilla browsers require the help of media players and browser plugins to play audio and video.
