You may need to install a plugin for Firefox.
STEPS
- Download the plugin.
- Verify the plugin is installed! Type "about:plugins" in your address bar, you should see an entry for Microsoft Windows Media Player Firefox Plugin (File name: np-mswmp.dll)
- If your plugin, np-mswmp.dll is disabled please do the following:
Within Firfox click on Tools at the top of the screen / Add ons / Plugins/ Click on Microsoft Windows Media Player Firfox Plugin / Enable