Examine source code of rotrima

{
  "theme": {
    "images": {
      "theme_frame": "300_7470Panoramaa.jpg"
    },
    "colors": {
      "frame": "#bd3737",
      "tab_background_text": "#cf2929"
    }
  },
  "version": "2.0",
  "name": "rotrima",
  "manifest_version": 2,
  "description": "Vlieland"
}