How to Resolve “Server not found” Error in Firefox

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A common problem is the error message “Server not found – Firefox can’t find the server” in Firefox. Many users report encountering this error when trying to load a website with Firefox, even though the website can be opened in other browsers without any problems. If you encounter the same problem, read this article to find a solution.

What causes the “Server not found” error message in Firefox?

Weak Internet connection: Another reason that can cause the “server not found” error may be a weak or unstable Internet connection.

A technical fault on the server-side: The main reason for this error may be a technical fault on the server-side that prevents the user to establish a connection between the browser and the website, causing the browser to display a “Server not found” error.

Blocked Site: The user may be attempting to access a site that has been blocked by the local government for security or privacy reasons. Attempting to access a blocked site may cause an error and the user will see a “Server not found” error instead of the site’s home page.

Typing error: Spelling or other errors in the site’s name in the search bar may also cause a “Server not found” error.

How to repair the “Server not found” error in Firefox?

Turn off Prefetching in DNS

1. In the Firefox URL bar, type about:config, then press the Return key.
2. The following warning may appear: This may void your warranty. Ignore the message and click I accept the risk.
3. When viewing the settings list, hold down the Ctrl key and select New, then select Boolean.
4. In the Enter Parameter Name window, select network.dns.disablePrefetch and click OK.
5. When prompted to set the value, select True and click OK.

Disable IPv6

Firefox turns on IPv6 by default, which can cause problems in some scenarios. We can try disabling IPv6 and then see if the “Firefox server not found” page load problem is resolved.

1. In the Firefox URL, type about:config, then press the Return key.
2. The following warning may appear: This may void your warranty. Ignore the message and click I accept the risk.
3. In the search box, type network.dns.disableIPv6.
4. In the options list, select network.dns.disableIPv6 and change the value from false to true.

Check your Firefox proxy settings

1. Select the menu button and choose Settings.
2. Go to the Advanced section.
3. Now select the Networking tab.
4. Go to Connections and select Settings.
5. If you’re not using a proxy server, select No Proxy.
6. If you are connecting through a proxy server, reconcile your proxy settings with those of your other browser.
7. Then click OK. Any changes you have made will be saved automatically.

Check your Internet and browser connection

This is one of the most rudimentary but effective methods of finding the cause of the Firefox Server Not Found page load problem.

1. Check if you can open the same site in other browsers, and if not, check other sites.
2. Make sure your Internet security software and firewall settings are correct.
3. If you are using a proxy server, make sure it can connect to the internet.

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