Examine source code of KitaKitune2

{
  "name": "KitaKitune2",
  "manifest_version": 2,
  "version": "6.0",
  "theme": {
    "images": {
      "theme_frame": "RYU_v6.jpg"
    },
    "colors": {
      "frame": "rgba(245, 247, 250, 0)",
      "tab_background_text": "rgba(225, 243, 250, 1)",
      "toolbar": "rgba(0, 0, 0, 0.28)",
      "bookmark_text": "rgba(244, 250, 227, 1)",
      "toolbar_field": "rgba(87, 0, 0, 1)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(52, 107, 235, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3fe66a3b-cf94-4bc2-9a78-85ed8cbea2ec}"
    }
  }
}