index.md

---

title: management.onInstalled()
slug: Mozilla/Add-ons/WebExtensions/API/management/onInstalled
page-type: webextension-api-event
tags:
  - API
  - Add-ons
  - Event
  - Reference
  - WebExtensions
  - management
  - onInstalled
browser-compat: webextensions.api.management.onInstalled

---

{{AddonSidebar()}}

Fired when an add-on is installed.

This API requires the "management" API permission.

Syntax

browser.management.onInstalled.addListener(listener)
browser.management.onInstalled.removeListener(listener)
browser.management.onInstalled.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)

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

addListener syntax

Parameters

• function

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

    • info

      • : ExtensionInfo: info about the add-on that was installed.

Browser compatibility

{{Compat}}

Examples

Log the names of add-ons when they are installed:

browser.management.onInstalled.addListener((info) => {
  console.log(`${info.name} was installed`);
});

{{WebExtExamples}}

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