Firefox: Timer stays at 0:00 and nothing plays

[SuperPizza]

I am using firefox on a macbook and it is showing 0:00 on all songs and not letting me play anything.

Moderator Edit: Edited title for clarity

[AdamPandora]

@SuperPizza I moved your post over to the Desktop space.

I've enabled a trace on your account to help us better understand what's happening.

For this trace to be useful, we'll need you to run through our troubleshooting steps here: Firefox Troubleshooting

Let me know how it goes.