Examine source code of ScaredCat

{
  "theme": {
    "images": {
      "theme_frame": "ScaredCat.jpg"
    },
    "colors": {
      "frame": "#544b4b",
      "tab_background_text": "#0d0101"
    }
  },
  "version": "2.0",
  "name": "ScaredCat",
  "manifest_version": 2,
  "description": "Scared cat.  You just got to have one of these when it's so close to Halloween."
}