Examine source code of Davide_sketch and pastel

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#030303",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Davide_sketch and pastel",
  "manifest_version": 2,
  "description": "from my gallery at <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/721b341a26603f4c978ac04f6849c456c8f822051eac03a32b1c822a00268486/http%3A//sotovoce.deviantart.com/\">http://sotovoce.deviantart.com/</a>"
}