# NativeMessagingObserverMode

[**@openpolyfill/firefox-addon-playwright-harness**](/docs/api/reference)

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[@openpolyfill/firefox-addon-playwright-harness](/docs/api/reference/globals) / NativeMessagingObserverMode

# Type Alias: NativeMessagingObserverMode

> **NativeMessagingObserverMode** = `"non-blocking"` \| `"blocking"`

Defined in: [src/native-messaging-observer.ts:8](https://github.com/OpenPolyfill/FirefoxAddonPlaywrightHarness/blob/9532a852e3623332cfb2eacd964ebdb4045220e5/src/native-messaging-observer.ts#L8)