These shows play in a pop-up music player, at least that is the option I choose. From time to time, I have to put the players on pause, and if the players are on pause too long, they lose the connection, and you need to reload the player to get them playing again.
I am on a Mac OSX 10.9 running firefox v. 25.0. "Command+R" never worked to reload this pop-up window music player, but in earlier versions of firefox there was a force re-load button in the firefox menus that would work to reset the player.
This option seems to have disappeared, and I can't figure out how to force reload the pop-up window. (Note: The pop-up music player window does not have the normal navigation buttons like 'home' or 'reload')