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Editorial Team
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Asked: 2026-06-17T14:03:46+00:00

Why does this example http://chrisjj.drivehq.com/test.htm <audio controls> <source src=horse.ogg type=audio/ogg> <source src=horse.mp3 type=audio/mpeg> Your

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Why does this example http://chrisjj.drivehq.com/test.htm 

<audio controls>
  <source src="horse.ogg" type="audio/ogg">
  <source src="horse.mp3" type="audio/mpeg">
Your browser does not support the audio element.
</audio>

(from http://www.w3schools.com/html/html5_audio.asp) fail on Firefox 16 and IE9?

It succeeds on Chrome V24.

UPDATE:

<!doctype html>  
<audio controls>
  <source src="horse.ogg" type="application/x-msdownload">
  <source src="horse.mp3" type="audio/mpeg">
Your browser does not support the audio element.
</audio>

works on IE9, but (despite http://web-sniffer.net/ shows “Content-Type: application/x-msdownload”) not on FF.

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1 Answer

  1. Editorial Team

    In Firefox, because the content-type header of the server’s HTTP response for horse.ogg is application/x-msdownload instead of audio/ogg.

    In IE9, because the page is not a well formed HTML document with a DOCTYPE, <html>, <head> and <body> elements. Not being a proper HTML document will trigger quirks mode.

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