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By default, Firefox does not support Integrated Windows Authentication and you are prompted for a User Name and Password when accessing such a site. The following steps outline how to override this default behavior, and trust specific site(s) for silent NTLM authentication.
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configure_firefox_for_integrated_windows_authentication.md
title author date source
Configure Firefox for Integrated Windows Authentication
Jon LaBelle
April 28, 2020

Configure Firefox for Integrated Windows Authentication

By default, Firefox does not support Integrated Windows Authentication and you are prompted for a User Name and Password when accessing such a site. The following steps outline how to override this default behavior, and trust specific site(s) for silent NTLM authentication.

  1. Open Firefox.

  2. Type about:config in the URL address bar.

  3. In the Search preference name field, type ntlm.

  4. Double-click the network.automatic-ntlm-auth.trusted-uris field to edit the value.

    • Enter a comma-separated list comprised of URLs, domain names, host or computer names, then click OK. For example, type:
    http://server1.mydomain.com,https://server1.mydomain.com,MyComputerName,http://ServerName`

    NOTE For security reasons, make this list as restrictive as possible.

  5. Restart Firefox for the changes to be applied.

References

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