index.md

---

title: extension.inIncognitoContext
slug: Mozilla/Add-ons/WebExtensions/API/extension/inIncognitoContext
page-type: webextension-api-property
tags:
  - API
  - Add-ons
  - Extension
  - Extensions
  - Non-standard
  - Property
  - Reference
  - WebExtensions
  - inIncognitoContext
browser-compat: webextensions.api.extension.inIncognitoContext

---

{{AddonSidebar()}}

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

Syntax

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

Value

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

Browser compatibility

{{Compat}}

{{WebExtExamples}}

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