Examine source code of Waiting for steps

{
  "theme": {
    "images": {
      "theme_frame": "waitingforsteps.jpg"
    },
    "colors": {
      "frame": "#027822",
      "tab_background_text": "#c5ffbf"
    }
  },
  "version": "2.0",
  "name": "Waiting for steps",
  "manifest_version": 2,
  "description": "Some wooden stairs in grass of a cemetery on a hill!"
}