Examine source code of Austrian Castle

{
  "theme": {
    "images": {
      "theme_frame": "AustrianCastle.jpg"
    },
    "colors": {
      "frame": "#0f0101",
      "tab_background_text": "#f5eded"
    }
  },
  "version": "2.0",
  "name": "Austrian Castle",
  "manifest_version": 2,
  "description": "A photo of a castle along the autobahn outside Salzburg, Austria.\nSee more from PeakPixels on our channel on YouTube."
}