index.md

---

title: permissions.onAdded
slug: Mozilla/Add-ons/WebExtensions/API/permissions/onAdded
page-type: webextension-api-event
tags:
  - API
  - Add-ons
  - Event
  - Permissions
  - Reference
  - WebExtensions
  - onAdded
browser-compat: webextensions.api.permissions.onAdded

---

{{AddonSidebar()}}

Fired when the extension granted new permissions.

Syntax

browser.permissions.onAdded.addListener(listener)
browser.permissions.onAdded.removeListener(listener)
browser.permissions.onAdded.hasListener(listener)

Events have three functions:

• addListener(callback)

  • : Adds a listener to this event.

• removeListener(listener)

  • : Stop listening to this event. The listener argument is the listener to remove.

• hasListener(listener)

  • : Check whether listener is registered for this event. Returns true if it is listening, false otherwise.

addListener syntax

Parameters

• callback

  • : Function that will be called when this event occurs. The function will be passed the following arguments:

    • permissions

      • : {{WebExtAPIRef("permissions.Permissions")}} object containing the permissions that were granted.

Browser compatibility

{{Compat}}

Examples

function handleAdded(permissions) {
  console.log(`New API permissions: ${permissions.permissions}`);
  console.log(`New host permissions: ${permissions.origins}`);
}

browser.permissions.onAdded.addListener(handleAdded);

{{WebExtExamples}}

Note: This API is based on Chromium's chrome.permissions API.