Examine source code of Abstract by Xoul

{
  "theme": {
    "images": {
      "theme_frame": "designisopersona.png"
    },
    "colors": {
      "frame": "#a1a1a1",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Abstract by Xoul",
  "manifest_version": 2,
  "description": "Visit <a href=\"https://outgoing.prod.mozaws.net/v1/a2a33f385eca06abc3425aee85e03efa07a0c906ed79deaa80f8fcd66abef37d/http%3A//DesignISO.com\" rel=\"nofollow\">DesignISO.com</a> if you like this persona! \n\nTested on 1024x786 resolution."
}