Often, a site is blocked because of saved settings or corrupted data specific to that domain. How to Unblock Websites in Firefox - Media Pantheon, Inc.
For advanced users, Firefox’s hidden configuration page ( about:config ) contains flags that might be blocking connections. how to unblock a site in firefox
Firefox can use DoH (DNS over HTTPS) to encrypt your requests, hiding them from your ISP. Often, a site is blocked because of saved