Examine source code of SevenPro

{
  "theme": {
    "images": {
      "theme_frame": "Persona-Copy.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#dedede"
    }
  },
  "version": "2.0",
  "name": "SevenPro",
  "manifest_version": 2,
  "description": "To go with 7Pro: <a href=\"https://outgoing.prod.mozaws.net/v1/d3cf520ebe76026f13c24cd2ece6bd430b26f77242abcf30c1d9e59898cb8336/http%3A//krissirk.deviantart.com/art/7Pro-Final-for-7-146771367\" rel=\"nofollow\">http://krissirk.deviantart.com/art/7Pro-Final-for-7-146771367</a>"
}