When I click on the link, about 2 seconds later I hear audio.
In my case, I'm not running any kind of cookie manager, NoScript, Adblock, etc.
For reference, I will list what I have in regards to Extensions, Appearance, and Plug-ins.
Extensions• NONE
Appearance• Default 18.0.1 (the default theme)
Plugins that I have enabled•Shockwave Flash 11.5.502.146
•Silverlight Plug-In 5.1.10411.0
I feel that there is probably something you have installed or running that is blocking it from working. As darcilicious
has said, try running Firefox in safemode and see if that helps.
--Brian