Examine source code of Red Dragonfly

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#3a611c",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Red Dragonfly",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/e914ab7345c9b619f2e666b6fb67b163dcbe5fc5d2c9a49680630d8a014327bd/https%3A//pixabay.com/en/users/makamuki0-1102736/\">Marc Pascual\n</a>"
}