Examine source code of ThereBeDragons

{
  "theme": {
    "images": {
      "theme_frame": "ThereBeDragons.jpg"
    },
    "colors": {
      "frame": "#de1d1d",
      "tab_background_text": "#140e0e"
    }
  },
  "version": "2.0",
  "name": "ThereBeDragons",
  "manifest_version": 2,
  "description": "A dragon image from the pages of old Monk religious books to decorate your FireFox Browser with.  Never argue with a dragon.  They find you crunchy and good with mustard."
}