Examine source code of corn maze

{
  "theme": {
    "images": {
      "theme_frame": "cornmaze.jpg"
    },
    "colors": {
      "frame": "#6b8756",
      "tab_background_text": "#ebd570"
    }
  },
  "version": "2.0",
  "name": "corn maze",
  "manifest_version": 2,
  "description": "a giant maze made in corn field"
}