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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "__MSG_extName__",
  "default_locale": "en",
  "manifest_version": 2,
  "version": "0.3",
  "version_name": "1.2",
  "offline_enabled": true,
  "app": {
    "background": {
      "page": "app_main.html"
    }
  },
  "icons": {
    "16": "icon.png",
    "128": "icon.png"
  },
  "permissions": [
    "alarms",
    {
      "fileSystem": [
        "write"
      ]
    },
    {
      "socket": [
        "tcp-connect",
        "tcp-listen",
        "udp-bind",
        "udp-send-to",
        "resolve-host"
      ]
    },
    "unlimitedStorage",
    "notifications",
    "storage",
    "accessibilityFeatures.read",
    "https://clients2.google.com/"
  ],
  "requirements": {
    "3D": {
      "features": [
        "webgl"
      ]
    }
  },
  "kiosk_enabled": true,
  "import": [
    {
      "id": "mfaihdlpglflfgpfjcifdjdjcckigekc"
    }
  ],
  "file_handlers": {},
  "arc_metadata": {
    "apkList": [
      "JLPT Locker.apk"
    ],
    "enableExternalDirectory": false,
    "formFactor": "phone",
    "name": "JLPT Locker",
    "orientation": "portrait",
    "packageName": "com.shex.jlptlocker"
  }
}