Examine source code of Artician - Dark

{
  "theme": {
    "images": {
      "theme_frame": "FireFox_personas_02.jpg"
    },
    "colors": {
      "frame": "#cccccc",
      "tab_background_text": "#cccccc"
    }
  },
  "version": "2.0",
  "name": "Artician - Dark",
  "manifest_version": 2,
  "description": "Browser Artician with our very own Persona! Never lose that artician feeling :]\n\nLearn more about us @ <a href=\"https://outgoing.prod.mozaws.net/v1/3606702ca75281a5b285b37dd73cacbd8eabb75f23291ff98221a696883d4b88/http%3A//www.artician.com/about\" rel=\"nofollow\">http://www.artician.com/about</a>"
}