Examine source code of ArcaneCircles

{
  "theme": {
    "images": {
      "theme_frame": "AlchemyHeader.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "ArcaneCircles",
  "manifest_version": 2,
  "description": "<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/97b22843fad5438023550a365c6c32da3ef730dd5e1fa3ac696caab6b1bb03b4/http%3A//redheadstock.deviantart.com/art/Arcane-Circles-Symbols-Brushes-63580135\">http://redheadstock.deviantart.com/art/Arcane-Circles-Symbols-Brushes-63580135</a>"
}