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How can I play an audio file without the whole screen going black?

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When I play the mp3 file on IE it opens in a small screen so I can still see the web page. On Firefox the whole screen is taken up with the sound file being played. Can this be changed?

When I play the mp3 file on IE it opens in a small screen so I can still see the web page. On Firefox the whole screen is taken up with the sound file being played. Can this be changed?

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Is that file played in a tab in the current window or in a separate pop-up window?

Are you allowing pop-up to modify the window size (dom.disable_window_move_resize = false)?

You can try set the Boolean pref media.windows-media-foundation.enabled to false on the about:config page to disable the built-in HTML5 media player.