Examine source code of Yoru no yatterman

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#595200"
    }
  },
  "version": "2.0",
  "name": "Yoru no yatterman",
  "manifest_version": 2,
  "description": "\"As long as the pure, righteous, and beautiful Doronbo exist.\n\nThe yatterman will have no place in this world!\n\nWe'll drive the darkness away and bring a new dawn to this world!\""
}