Examine source code of SUPERMAN RETRO by MaDonna

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#fd5c18",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "SUPERMAN RETRO by MaDonna",
  "manifest_version": 2,
  "description": "Superman, DC Comics, Clark Kent, Metropolis, city, hero, sunset, sky, Action comics, funny books, action hero\n\nDesigned by MaDonna"
}