How to set up Smart DNS on Firefox web browser
At the end of this process, it is very important to restart your web browser
Launch the Firefox web browser, click on the "Hamburger menu" (3 lines) on the top right and choose "Settings"
Choose "Privacy & Security"
Scroll down to "DNS over HTTPS" and select "Increased Protection"
In the "Choose Provider" drop-down, select "Custom" and enter,
https://dns.streamlocator.com/dns-query
Ensure you restart the web browser!