Examine source code of Cragum

{
  "theme": {
    "images": {
      "theme_frame": "personabull.jpg"
    },
    "colors": {
      "frame": "#a6a6a6",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Cragum",
  "manifest_version": 2,
  "description": "This my second attempt as the first didnt work so well."
}