> [!CAUTION]
> **Important:** Chrome will be removing support for Chrome Apps on all platforms. Chrome browser and the Chrome Web Store will continue to support extensions. [**Read the announcement**](https://blog.chromium.org/2020/08/changes-to-chrome-app-support-timeline.html) and learn more about [**migrating your app**](https://developer.chrome.com/apps/migration).

Every app has a [JSON](https://www.json.org)-formatted manifest file, named `manifest.json`, that provides important
information.

## Field summary

The following code shows the supported manifest fields for Apps, with links to the page that
discusses each field.

    {
      // Required
      "app": {
        "background": {
          // Optional
          "scripts": ["background.js"]
        }
      },
      "manifest_version": 2,
      "name": "My App",
      "version": "versionString",

      // Recommended
      "default_locale": "en",
      "description": "A plain text description",
      "icons": {...},

      // Optional
      "action_handlers": ["new_note"],
      "author": ...,
      "automation": ...,
      "bluetooth": {
        "uuids": ["1105", "1006"]
      },
      "commands": {...},
      "cross_origin_embedder_policy": {
        "value": "require-corp"
      },
      "cross_origin_opener_policy": {
        "value": "same-origin"
      },
      "current_locale": ...,
      "differential_fingerprint": ...,
      "event_rules": [{...}],
      "externally_connectable": {
        "matches": ["*://*.example.com/*"]
      },
      "file_handlers": {...},
      "file_system_provider_capabilities": {
        "configurable": true,
        "multiple_mounts": true,
        "source": "network"
      },
      "import": [{"id": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"}],
      "key": "publicKey",
      "kiosk": {
        "always_update": ...,
        "required_platform_version": ...
      },
      "kiosk_enabled": true,
      "kiosk_only": true,
      "kiosk_secondary_apps": ...,
      "minimum_chrome_version": "versionString",
      "nacl_modules": [...],
      "oauth2": ...,
      "offline_enabled": true,
      "optional_permissions": ["tabs"],
      "permissions": ["tabs"],
      "platforms": ...,
      "replacement_android_app": ...,
      "replacement_web_app": ...,
      "requirements": {...},
      "sandbox": [...],
      "short_name": "Short Name",
      "sockets": {
        "tcp": {
          "connect": "*"
        },
        "udp": {
          "send": "*"
        }
      },
      "storage": {
        "managed_schema": "schema.json"
      },
      "system_indicator": ...,
      "update_url": "http://path/to/updateInfo.xml",
      "url_handlers": {...},
      "usb_printers": {
        "filters": [...]
      },
      "version_name": "aString",
      "webview": {...}
    }