After the last update wmp plugin is missing in Add-ons, but is still correct installed. Reinstall will not work. What can I do?

I been lissening to online radio. Necessary to update Firefox. After the last update the windows media player plugin has disappeared from the list of Add-ons, while always being correct installation. I reinstalled it, but that has not worked. I have replaced/deleted some files in firefox as suggested, for similar problems, but that no longer works.
Now, I can not play wmp files on firefox.

Hope you can help me solve this problem.

Found a solution:

Go in Subject: config and change plugins.load_appdir_plugins from false to true. Apparently FF21 assigns the value false by default causing it to not detect plug-ins installed in this way.

Tags: Firefox

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