Examine source code of All Fall

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#472d15",
      "tab_background_text": "#fffaf5"
    }
  },
  "version": "2.0",
  "name": "All Fall",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/34e2f4b924a2c1c354de9831c426d77042dd07a18e717b07bc103c26ae4cafd6/https%3A//pixabay.com/en/users/geralt-9301/\">Gerd Altmann\n</a>"
}