Examine source code of knvb Holland

{
  "theme": {
    "images": {
      "theme_frame": "preview_large.jpg"
    },
    "colors": {
      "frame": "#fa6c00",
      "tab_background_text": "#fa6c00"
    }
  },
  "version": "2.0",
  "name": "knvb Holland",
  "manifest_version": 2,
  "description": "Knvb Holland"
}