---
title: Configuring Mozilla Firefox
description: Configure Kerberos authentication for the Firefox browser.
component: pingone
page_id: pingone:integrations:p1_configuring_mozilla
canonical_url: https://docs.pingidentity.com/pingone/integrations/p1_configuring_mozilla.html
revdate: January 9, 2023
section_ids:
  steps: Steps
---

# Configuring Mozilla Firefox

Configure Kerberos authentication for the Firefox browser.

## Steps

1. Start the Firefox browser.

2. In the address bar, enter `about:config`.

3. If you are presented with a security warning, click **Accept the risk and continue**.

4. In the **Search** field, enter `network.negotiate-auth.trusted-uris` and then click the pencil icon.

5. Do one of the following:

   * If the environment is not configured with a custom domain, enter the two trusted addresses separated by a comma, and then click the check mark icon.

   * If the environment is configured with a custom domain, enter the custom domain and then click the check mark icon.

     For more information about the trusted URI values, see [Configuring end user browsers](p1_configuring_end_user_browsers.html).