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


let isPrivate = browser.extension.inIncognitoContext;  // true or false


A boolean value indicate if the current script is running in a private tab or process.

Browser compatibility

BCD tables only load in the browser

Note: 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.