Examine source code of Old Machine

{
  "theme": {
    "images": {
      "theme_frame": "oldmachine_FFP_h.jpg"
    },
    "colors": {
      "frame": "#e1f009",
      "tab_background_text": "#e8a215"
    }
  },
  "version": "2.0",
  "name": "Old Machine",
  "manifest_version": 2,
  "description": "An items of an old steam engine."
}