Examine source code of Lancaster Sunrise

{
  "theme": {
    "images": {
      "theme_frame": "Lancaster_Tree.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#2e210f"
    }
  },
  "version": "2.0",
  "name": "Lancaster Sunrise",
  "manifest_version": 2,
  "description": "Golden sunrise overlooking rolling hills and farms in Lancaster, Pennsylvania featuring lone tree in foreground."
}