Some antivirus suites (Norton, McAfee, Kaspersky, Bitdefender) include web protection that blocks certain sites. Also, Windows Defender Firewall might be interfering.
Scroll down to and click "Clear Data" if a specific site is causing issues. 3. Check and Disable Extensions how to unblock a site in firefox
Firefox can use DoH (DNS over HTTPS) to encrypt your requests, hiding them from your ISP. blocking these scripts breaks the website
Firefox’s Enhanced Tracking Protection (ETP) blocks scripts, trackers, and ads. Occasionally, blocking these scripts breaks the website, causing it to display a blank page or an error screen. Unblock a Specific Site Visit the blocked website. Some antivirus suites (Norton
Firefox has built-in support for DNS-over-HTTPS (DoH), which encrypts your DNS queries and can bypass local DNS blocking:
The panel will list any active blocks. Click the X next to a blocked permission to reset it.