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For Mozilla platforms, MP3 is supported on Firefox OS, some Android devices and Desktop on Windows Vista and up. Support for Windows XP is coming in Firefox 26. It is available on Linux with custom builds and should be in by default soon. For a list of supported audio and video formats in Firefox see http://bluishcoder.co.nz/2013/08/21/html-media-support-in-fi....

I suspect browser doesn’t matter much here. Console yields a TypeError until Flash is enabled (whitelisted) for the page.

I just came here to mention it wasn't working for me either. Same problem, probably.