What happened to MP3 support in Firefox 26?

I can not play MP3 or DVD any longer.
Everything that used to work perfectly, but today they do not.
I have downloaded Real Player again and it worked for half the MP3 and stopped.
I tried to download Google Chrome and it did not work at all.
Uninstalled Google Chrome.
My wife and I are members of a study group that use MP3 files for each lesson.
We sat by my monitor and watched literally hundreds of lessons in a satisfactory manner.
It's frustrating to be unable to continue.
Something wrong, but how to fix it?

Firefox changed how 26 MP3s are played on Windows XP. Is the problem on a system of XP, or XP mode on Windows 7?

In Windows Vista and later, Firefox can use the Media Foundation, components of Windows, to decode the MPEG media and play natively, instead of using a plugin. If you want to try to turn that off, there is a hidden parameter.

(1) in a new tab, type or paste Subject: config in the address bar and press ENTER. Click on the button promising to be careful.

(2) in the search above the list box, type or paste the media and make a pause so that the list is filtered

(3) double-click the preference media.windows - media - foundation.enabled to change its value from true to false.

(4) double click on the preference media.windows - media - foundation.play - stand alone to change its value from true to false.

Does make a difference?

Tags: Firefox

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