index.md

---

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

---

{{AddonSidebar()}}

The ID of the extension.

Syntax

let myAddonId = browser.runtime.id;

Value

A string representing the add-on ID. If the extension specifies an ID in its browser_specific_settings manifest.json key, runtime.id contains that value. Otherwise, runtime.id contains the ID that was generated for the extension.

Browser compatibility

{{Compat}}

{{WebExtExamples}}

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