Examine source code of Monster Bones

{
  "theme": {
    "images": {
      "theme_frame": "BONES.jpg"
    },
    "colors": {
      "frame": "#004990",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Monster Bones",
  "manifest_version": 2,
  "description": "Part of an illustration from my childrens book."
}