Examine source code of Durians for You

{
  "theme": {
    "images": {
      "theme_frame": "randomdurians.jpg"
    },
    "colors": {
      "frame": "#fffce5",
      "tab_background_text": "#f2e679"
    }
  },
  "version": "2.0",
  "name": "Durians for You",
  "manifest_version": 2,
  "description": "Everybody needs some durians. They may not smell too pretty, but they will make your browser interesting."
}