That must have been the problem I had when I first tried the FM radio then. Cheers.

Haven't re-installed Fennec since I flashed to the new firmware so I tried FM radio again and it worked fine indeed.

On the UI side of things, I think that the user should be informed in some way or another that it is normal that bluetooth switches on when the application launches and that radio won't work if they switch off bluetooth.

I initially didn't know that the FM receiver and bluetooth were on the same chip (I only learned that later by reading this thread). There's no indication of that anywhere (not even on the application description page in the catalog). So when I saw the "Bluetooth switched on" system message displayed after having launched FM Radio, I assumed that it was some sort of bug with the application. I of course immediately switched off bluetooth... and the FM radio stopped playing. After that, it took me a while to get it to play again. Manually switching bluetooth back on didn't work. Restarting the application didn't work either (it launched but radio didn't play). It took quite a lot of switching bluetooth on and off, starting and restarting the FM radio app and plugging and unplugging the headphones before the FM radio eventually started to play again (not sure what was the trick to get it to work again).

I'm guessing I won't be the only user puzzled with the Bluetooth message and that I won't be the only one who will instinctively switch bluetooth back off straight away. Since there doesn't seem to be a way to remove the dependency on bluetooth, it would be worth displaying a message somewhere (perhaps on first startup) letting the user know about this.