Examine source code of Color Puzzle

{
  "manifest_version": 2,
  "name": "Color Puzzle",
  "version": "1.0.0",
  "description": "Xếp màu theo thứ tự RGB/gradient ngay trên toolbar.",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_title": "Color Puzzle",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "color-puzzle-80c23228-22e5-4681-b143-99298ce2957e@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}