Examine source code of Alhambra_at_night

{
  "theme": {
    "images": {
      "theme_frame": "Alhamra_at_night.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Alhambra_at_night",
  "manifest_version": 2,
  "description": "This is a view of the great Alhamra Castle in Spain ... Well, enjoy. The photo is taken from Wikimedia"
}