Examine source code of 3 Snails

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#524747",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "3 Snails",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/973423545141579b60f883f493068ce06443f0f0e6d14c30e151b78a35cd4de2/https%3A//pixabay.com/en/users/AdinaVoicu-485024/\">Adina Voicu \n</a>"
}