Allegedly, on or about 08 June 2013, Ed Greshko sent:
FWIW, the link provided seems to be a process to upgrade the camera's firmware. Not sure how well that will work under Linux anyway.... :-)
Unless they've changed their technique, the firmware update was done by putting a file onto a SD memory card, then inserting that into the camera. At least that was how I upgraded a gopro camera quite some time ago.