Examine source code of sweet Icon collage

{
  "theme": {
    "images": {
      "theme_frame": "iconscollagefinished.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#895eff"
    }
  },
  "version": "2.0",
  "name": "sweet Icon collage",
  "manifest_version": 2,
  "description": "sweet girls \nicon credits: <a href=\"https://outgoing.prod.mozaws.net/v1/0a4f7b5ebb6e422a2b0338fc77f92db5874dacaaac9ca88cfcbeb9b65d18356d/http%3A//thefadingnight.blogspot.com/\" rel=\"nofollow\">http://thefadingnight.blogspot.com/</a>"
}