Examine source code of Gray-Test Project

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Gray-Test Project",
  "manifest_version": 2,
  "description": "Official theme of The Gray-Test Project. <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/2178038032eddf90942af0f781b3746c4f065953e6bc2d17fdf4e4975b415212/http%3A//www.graytestproject.com\">www.graytestproject.com</a>"
}