Examine source code of Cookies & Tea Please

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#2b2723",
      "tab_background_text": "#e8e8e8"
    }
  },
  "version": "2.0",
  "name": "Cookies & Tea Please",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/2f863b7114949dbffd7c5a1fb70cb5e56120611d321058444604a1e797e08dee/https%3A//pixabay.com/en/users/jyliagorbacheva-5290522/\">jyliagorbacheva\n</a>"
}