Quicktime plugin for FireFox problems

QuickTime is not supported on a Windows 64 bit OS.
You can click in the "space" you think the controller should appear and things should "work".

I frequent the Urban Dictionary (http://www.urbandictionary.com/). It requires QuickTime to play the sound bytes. But every time I try to listen to one of 'em, Firefox says that I am missing the QuickTime plugin. I tried going into my Control Panel, QuickTime applet, Browser Tab, clicking the MIME types button, clicking the Use Defaults button, then restarting Firefox, but still I get the same error message when trying to listen to those sound bytes. I have the latest version of QuickTime for Windows. I also have the latest version of Firefox for Windows too. I'm still struggling to get it working. I'd greatly appreciate any help.

My little test at the Site showed the files to be .mp3 format.
Easy fix if you have another browser plug-in installed for that file extension:
Click the link and launch the small pop-up window. Ignore any error messages.
View the "page source" (the html code that makes a browser work).
About half way down the page you'll find the "src=" tag. The URL is displayed right after it.
Copy the URL and you can open the .mp3 file in QuickTime Player (or any other player of your choice).