Windows Media Player does not include a plugin for Firefox. Microsoft have made one and you can get it from http://port25.technet.com/pages/windows-media-player-firefox-plugin-download.aspx

You may also need to copy the plugin file '''''np-mswmp.dll''''' into the Firefox\plugins folder as detailed in the 2nd paragraph of the "Installing the new plugin" section of the following article. ('''Note''': <u>In Firefox 4</u> beta versions, the Firefox\plugins folder does not exist by default, but will be used if you create the folder, then copy the plugin into the newly created folder). See: http://kb.mozillazine.org/Windows_Media_Player#Installing_the_new_plugin <br /> --------------------------- <br /> '''Other issues needing your attention''' The information submitted with your question indicates that you have out of date plugins with known security and stability issues that should be updated. To see the plugins submitted with your question, click "More system details..." to the right of your original question post. You can also see your plugins from the Firefox menu, Tools > Add-ons > Plugins.<br /> <br /> *Next Generation Java Plug-in 1.6.0_21 for Mozilla browsers **3 updates behind **'''''Security update version 1.6.0_24 released 2011-02-10''''' #'''Check your plugin versions''': http://www.mozilla.com/en-US/plugincheck/ #*'''Note: plugin check page does not have information on all plugin versions''' #'''Update the [[Java]] plugin''' to the latest version. #*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE) #**'''''Be sure to <u>un-check the Yahoo Toolbar</u> option during the install if you do not want it installed. #*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates #* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml #* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org #*Java Test: http://www.java.com/en/download/help/testvm.xml