Boolean value, true for content scripts running inside private browsing tabs and for extension pages running inside a private browsing process.

Browser compatibility

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ChromeEdgeFirefoxOperaFirefox for Android
inIncognitoContextChrome Full support YesEdge Full support 17Firefox Full support 45Opera Full support YesFirefox Android Full support 48


Full support  
Full support

This API is based on Chromium's chrome.extension API. This documentation is derived from extension.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.