Examine source code of The Wolf and the Moon

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#3e52a3",
      "tab_background_text": "#1307e8"
    }
  },
  "version": "2.0",
  "name": "The Wolf and the Moon",
  "manifest_version": 2,
  "description": "Animated wolf's theme with blue-ish scenery."
}