Examine source code of BecauseRobots Dark

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#d3d7cf",
      "tab_background_text": "#eeeeec"
    }
  },
  "version": "2.0",
  "name": "BecauseRobots Dark",
  "manifest_version": 2,
  "description": "BecauseRobots presents the BecauseRobots Dark persona, designed to match the look of <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/83ade2778a7fd51ea1bf6b62472cb7bcfc2c2d73c757a6acb6accaafac25ea3c/http%3A//BecauseRobots.com\">BecauseRobots.com</a>. See\n\n<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/fea6ac12e835319c1914cc7a0e25409568f48fa65b45b3767726e40b2519e7f0/http%3A//becauserobots.com/\">http://becauserobots.com/</a>"
}