Examine source code of Sintel 2

{
  "theme": {
    "images": {
      "theme_frame": "Sintel2_top.jpg"
    },
    "colors": {
      "frame": "#c9c9c9",
      "tab_background_text": "#cccccc"
    }
  },
  "version": "2.0",
  "name": "Sintel 2",
  "manifest_version": 2,
  "description": "Scene from the computer animated movie Sintel. Original image copyright Blender Foundation | <a href=\"https://outgoing.prod.mozaws.net/v1/ed8db2b1e154550c57dacd2be546fd3345e0fd1dae9f44b6f1064f343886ee33/http%3A//sintel.org/\" rel=\"nofollow\">http://sintel.org/</a>"
}