Examine source code of Stone Circle

{
  "theme": {
    "images": {
      "theme_frame": "Stonecircle.jpg"
    },
    "colors": {
      "frame": "#13ab18",
      "tab_background_text": "#080101"
    }
  },
  "version": "2.0",
  "name": "Stone Circle",
  "manifest_version": 2,
  "description": "Circle of stones over water. Celtic inspired."
}