Examine source code of vintage green pattern

{
  "theme": {
    "images": {
      "theme_frame": "FRONT56.JPG"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "vintage green pattern",
  "manifest_version": 2,
  "description": "pattern by <a href=\"https://outgoing.prod.mozaws.net/v1/cb1d13a4e91e59f3b3f7c285307c9905f52d1b6ba74eba5f5a764ccff8e12e00/http%3A//sweartoshakeitup.deviantart.com/\" rel=\"nofollow\">http://sweartoshakeitup.deviantart.com/</a>"
}