Examine source code of LokiKitty

{
  "theme": {
    "images": {
      "theme_frame": "lokihead.jpg"
    },
    "colors": {
      "frame": "#f0dc8d",
      "tab_background_text": "#3b2d0b"
    }
  },
  "version": "2.0",
  "name": "LokiKitty",
  "manifest_version": 2,
  "description": "lMy kitty"
}