Examine source code of shelby

{
  "theme": {
    "images": {
      "theme_frame": "shelby.jpg"
    },
    "colors": {
      "frame": "#a7db25",
      "tab_background_text": "#b7c916"
    }
  },
  "version": "2.0",
  "name": "shelby",
  "manifest_version": 2,
  "description": "cars"
}