Examine source code of Procar4

{
  "theme": {
    "images": {
      "theme_frame": "ProcarHead3.jpg"
    },
    "colors": {
      "frame": "#fcf9f9",
      "tab_background_text": "#b82828"
    }
  },
  "version": "2.0",
  "name": "Procar4",
  "manifest_version": 2,
  "description": "ProcarMotorsport - Die Motorsportevents in der Slowakei."
}