Examine source code of IJN ZEROS

{
  "theme": {
    "images": {
      "theme_frame": "ZerosB.jpg"
    },
    "colors": {
      "frame": "#cf2727",
      "tab_background_text": "#db1f1f"
    }
  },
  "version": "2.0",
  "name": "IJN ZEROS",
  "manifest_version": 2,
  "description": "Mitsubishi A6M2 \"Zero\" Fighter Model 11"
}