There are several browsers compatible with Query Guard Private DNS. This configuration lets you encrypt your connection to in order to protect your DNS queries from privacy intrusions and tampering.
Mozilla Firefox
Select the menu button > Settings.
Select Privacy & Security from the sidebar.
Scroll down to "DNS over HTTPS".
Select "Increased Protection".
From the "Choose Provider" dropdown select "Custom"
Enter your private Query Guard URL.
Check if browser is configured correctly by visiting the Query Guard Connection Status Page.