Examine source code of Route 66 sign

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#010101"
    }
  },
  "version": "2.0",
  "name": "Route 66 sign",
  "manifest_version": 2,
  "description": "<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/a6328a5ed2c8f70b48c315b0e044cb863bbcb08d2d32b44d543ee22218a01559/http%3A//www.youtube.com/watch%3Fv=yJ1-Ni4aCzs\">http://www.youtube.com/watch?v=yJ1-Ni4aCzs</a>"
}