If a site won't open a specific window or link:
Getting hit with a "Website Blocked" message is frustrating, whether you're trying to research for school, finish a work project, or just catch up on the news. Fortunately, Firefox is one of the most flexible browsers for bypassing these restrictions. how to unblock websites on firefox
If the website is blocked by your Internet Service Provider (ISP) or network administrator (e.g., at work or school), you cannot unblock it through settings alone. You must change your IP address. If a site won't open a specific window
Often, the problem is not an external block but a local misconfiguration. Firefox stores a cache of DNS entries (which translate domain names like example.com into IP addresses) and website data. A corrupted entry can lead to access failures. The first and most innocuous step is to clear this cache. Navigate to Settings > Privacy & Security > Cookies and Site Data , then click "Clear Data." More specifically, one can clear only the DNS cache by navigating to about:networking#dns in the address bar and clicking the "Clear DNS Cache" button. This simple act resolves many seemingly "blocked" sites. You must change your IP address