Workaround: If you look at the WAV file the player loads (right click > Inspect Element), that URL is playable in a new tab/browser window.
Firefox supports 8-bit and 16-bit PCM only ( https://support.mozilla.org/en-US/kb/html5-audio-and-video-f... ). I don't know why, exactly.
16 bits allows a dynamic range of 96dB while sounds you might come across in everyday life can peak over 130dB briefly.
You asked about NREC earlier but I failed to set up email alerts correctly (and that post is locked now) so I'm replying here if that's ok.
Hiring process takes around a month or two, depending on how schedules line up. There would be a basic phone/skype screen, then a in-depth technical screen on your areas of expertise, and finally an on-site interview. We try to get back to you on each stage within a week of each stage.
We have a bunch of employees that are on H1-B's right now. Let me know if you have any other questions and sorry for the late reply!