Examine source code of Train Railroad

{
  "theme": {
    "images": {
      "theme_frame": "trainmxb.jpg"
    },
    "colors": {
      "frame": "#9c9a9a",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Train Railroad",
  "manifest_version": 2,
  "description": "Photo by  <a href=\"https://outgoing.prod.mozaws.net/v1/22e49f7df0b591b638487b1505ad36b81533948c4065d62af8af3e6e8fdecc90/http%3A//www.flickr.com/photos/peluca1994/4329279466/\" rel=\"nofollow\">http://www.flickr.com/photos/peluca1994/4329279466/</a>"
}