Examine source code of Dark Moon

{
  "theme": {
    "images": {
      "theme_frame": "Mond.jpg"
    },
    "colors": {
      "frame": "#4160fc",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Dark Moon",
  "manifest_version": 2
}