Examine source code of Priness Serenity

{
  "theme": {
    "images": {
      "theme_frame": "serenity2.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Priness Serenity",
  "manifest_version": 2,
  "description": "This image was borrowed from <a href=\"https://outgoing.prod.mozaws.net/v1/2e7e0b6812bdd8d1a87b8b9c0ec4f0aba8ef000b1995289911067ff8886da67e/http%3A//Deivantart.com\" rel=\"nofollow\">Deivantart.com</a> user: Kaminary-san, all rights reserved for her"
}