Examine source code of traffic light

{
  "theme": {
    "images": {
      "theme_frame": "trafficlight.jpg"
    },
    "colors": {
      "frame": "#73736f",
      "tab_background_text": "#e8d41e"
    }
  },
  "version": "2.0",
  "name": "traffic light",
  "manifest_version": 2
}