Examine source code of Leopard Hearts

{
  "theme": {
    "images": {
      "theme_frame": "Leopard-Hearts-1A.png"
    },
    "colors": {
      "frame": "#fc00e7",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Leopard Hearts",
  "manifest_version": 2,
  "description": "Hearts in a leopard pattern by <a href=\"https://outgoing.prod.mozaws.net/v1/f0dc60a47c0a22845d7962ce9072589fd81935922522b555bc73a81c5db9e846/http%3A//Artaffex.com\" rel=\"nofollow\">Artaffex.com</a>"
}