index.md

---

title: extension.isAllowedFileSchemeAccess()
slug: Mozilla/Add-ons/WebExtensions/API/extension/isAllowedFileSchemeAccess
page-type: webextension-api-function
tags:
  - API
  - Add-ons
  - Extension
  - Extensions
  - Method
  - Non-standard
  - Reference
  - WebExtensions
  - isAllowedFileSchemeAccess
browser-compat: webextensions.api.extension.isAllowedFileSchemeAccess

---

{{AddonSidebar()}}

Returns true if the extension can access the "file://" scheme, false otherwise.

This is an asynchronous function that returns a Promise.

Syntax

let isAllowed = browser.extension.isAllowedFileSchemeAccess()

Parameters

None.

Return value

A Promise that will be fulfilled with a boolean: true if the extension is allowed access to "file://" URLs, false otherwise.

Firefox will always return false.

Browser compatibility

{{Compat}}

Examples

function logIsAllowed(answer) {
  console.log(`Is allowed: ${answer}`);
}

let isAllowed = browser.extension.isAllowedFileSchemeAccess();
isAllowed.then(logIsAllowed);

{{WebExtExamples}}

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