Similar to another post I found ( post-1829890 ), I am unable to play music or sounds from the Jukebox. I was able to do this a while back (approx. two years ago), but because I don't use it often, it wasn't until late last year that I noticed the sound wasn't working anymore. At the time I first noticed it, I was using OS X (Mavericks, I think) with Chrome (latest version). I tried FireFox and Opera as well, both with and without plug-ins, to no avail. I am currently running Linux (Debian 8) with Firefox and, again, the jukebox doesn't work. I tried the troubleshooting steps, i.e. ensuring master volume is maxed, disabling the browser plug-ins and clearing the cache, but nothing seems to help; I was even able to play the MP3 file from the post reference above.. Since this is a different OS and a different browser, I don't think either of those are a factor. The only thing I can think of is that my not installing Flash is the problem. Is this correct? As I don't like Flash, if this indeed the problem, I can live without the jukebox. I haven't used it that often, but I was planning on incorporating some sound effects for an upcoming horror game.