Examine source code of Doghouse

{
  "theme": {
    "images": {
      "theme_frame": "doghouse.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#0f0101"
    }
  },
  "version": "2.0",
  "name": "Doghouse",
  "manifest_version": 2,
  "description": "whimsical dog in his house while a cat looks at him from afar"
}