Examine source code of F-4 Phantom

{
  "theme": {
    "images": {
      "theme_frame": "F-4PhantomPersonacopy.jpg"
    },
    "colors": {
      "frame": "#4f4f4f",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "F-4 Phantom",
  "manifest_version": 2,
  "description": "A F-4 Phantom project I did."
}