Examine source code of Green Forests

{
  "theme": {
    "images": {
      "theme_frame": "213Crop3.jpg"
    },
    "colors": {
      "frame": "#f2e6e6",
      "tab_background_text": "#3b3939"
    }
  },
  "version": "2.0",
  "name": "Green Forests",
  "manifest_version": 2,
  "description": "Some green trees in the Belarusian forest."
}