Bluetooth Device... I assume you mean Bluetooth headset. I'm currently watching a video and using my Bluetooth headset. see screenshot You will need to take the same steps by clicking on the system tray and turn on Bluetooth and pair the device to your computer and then make sure the audio is set to go to that device.

Hey, I had the same problem until yesterday. I bought this new laptop and was tryin' to connect my bluetooth earphones to it but for some reason sound wasn't going to my bluetooth device. So I tested it on Chromium and it worked perfectly and then I by mistake played a video on firefox and it also worked perfectly. Now I can use my bluetooth earphones without any problems and without having to open chromium, only firefox. Dunno why it happened I saw some posts sayin firefox doesn't supports bluetooth but it worked. Try it out and tell us what happens.

In resume:

1. Open firefox 2. Open another browser that supports bluetooth 3. Play smth in that browser 4. Try to play smth in firefox while still playin in the other browser If you can hear what you played on firefox in your bluetooth device, it worked.