Firefox unfortunately doesn't support Soundcloud's stream types, so we're working on some fallbacks at the moment. Thanks for feedback though, we're working on make it compatible with as many browsers as possible. Works perfectly on Chrome and Safari currently.

You may want to try a polyfill like jPlayer.

thanks for the tip

It works fine for me in Firefox 24.

FF 24 too, and It complained here about the lack of MP3 support.

I can't test the sound playback because of a broken jack plug in the headphones socket... A pentalobe screwdriver is on its way.

We are using feature detection for audio/mpeg playback. Soundcloud only streams as mpeg.

Firefox only supports audio/mpeg when a third-party decoder is available.

https://developer.mozilla.org/en-US/docs/HTML/Supported_medi...

Some newer versions of Firefox work great, we're working on making it work with more versions soon.