Examine source code of Super Galeb G4

{
  "theme": {
    "images": {
      "theme_frame": "G4.jpg"
    },
    "colors": {
      "frame": "#3d3c3c",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Super Galeb G4",
  "manifest_version": 2,
  "description": "Serbian Airforce \n\nSuper Galeb G4, Attack & Training jet airplane. Produced in 80's, and in that time one of best light Attack / Training  planes"
}