This document describes how to prevent authentication prompts in Firefox or Chrome with the Security Assertion Markup Language (SAML) authentication solution for Cisco Cloud Web Security (CWS), with Microsoft Active Directory Federated Services (ADFS).
How to prevent repeated authentication prompts in Firefox with SAML and ADFS?
Add the URL of the Identity Provider (IdP) server as a trusted NTLM authentication source.
In the Firefox address bar, type about:config.
The browser will display a warning message, click Continue.
Search for network.automatic.
Double click on network.automatic-ntlm-auth.trusted-uris to modify the configuration.