Examine source code of Fractarte

{
  "theme": {
    "images": {
      "theme_frame": "Fractarte2.jpg"
    },
    "colors": {
      "frame": "#b00000",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Fractarte",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/b24a3977a310221b485427c5384fdb86f82d69cb4bcd421e104c23367cbd66a4/http%3A//Fractarte.com\" rel=\"nofollow\">Fractarte.com</a>"
}