Examine source code of Beach Frogs

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Beach Frogs",
  "manifest_version": 2,
  "description": "Based on this photo: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/21c40d08785ea02df398070d84269826ae902af21c5599720a1acf7cf4ed7e19/https%3A//pixabay.com/en/frog-water-frog-animal-green-water-1367440/\">https://pixabay.com/en/frog-water-frog-animal-green-water-1367440/</a>"
}