How to fix ‘Server not Found’ error in Firefox browser

Sean Jeffries avatar. By: Sean Jeffries
3 minute read

Home » How to fix ‘Server not Found’ error in Firefox browser

If you using Firefox Browser it is very likely that you have experienced the following error message “problem loading page firefox server not found.” As with all the error messages troubleshooting this error is not that easy and consists of several steps that one needs to follow. First things first in order to sort out this error we have to zero in on the cause.

Preliminary Checks

This is one of the most primitive yet effective methods of checking out the reason behind the “problem loading page Firefox server not found”

  • Check if the same website opens on other browsers, if not check with other websites.
  • Restart the modem and your device.
  • Ensure that the Internet security software and the Firewall settings. Check this link on how to configure your firewall so that the Firefox can function as intended.
  • If you are using a proxy server make sure that the proxy server can connect to the internet.
  • If the website is opened and rendered properly on the other browsers please follow the troubleshooting steps mentioned below.

Unable to load the websites after updating Firefox?

This is a very peculiar problem and usually, happens when your Internet security software is restricting Firefox from connecting to the internet. Also, remember that some of the internet security suites are capable of blocking access to the Internet despite being in an inactive state. Also, try to add and remove the Firefox from the list of trusted or recognised programs.

Firefox connection settings for using proxy server

Follow the steps in order to troubleshoot your Firefox proxy server connection settings.

  • Select the Menu Button and choose “Preferences”.
  • Go to “Advanced” panel
  • Now select the “Network” tab
  • Go to connections and select “Settings”
  • In case you don’t use Proxy Server select “No Proxy”.
  • If you connect via a Proxy Server check the Proxy Settings with the other browsers Proxy settings.
  • Once done click on “OK.” All the changes made will be automatically saved.

Disabling DNS Prefetching to solve the “problem loading page Firefox server not found” issue.

DNS prefetching technology is used by Firefox to render the web pages in a much faster fashion and sometimes this might actually play the spoilsport.

  • Go to the Firefox URL bar and type “about:config” and then press Return.
  • The following warning might appear, “This might void your warranty!” Ignore the message and click on “I accept the risk!”
  • Whilst checking out the list of preferences hold down the “Ctrl” key and select “New” followed by “Boolean.”
  • In the “Enter the preference name” window select “network.dns.disablePrefetch and then click “OK”
  • When asked to set the value select “True” and click on “OK”

Resolving the issue by switching off the IPv6

Firefox switches on the IPv6 by default and this has the tendency to cause issues in certain scenarios. We can try disabling the IPv6 and then check if the “problem loading page firefox server not found” problem is solved.

  • Go to the Firefox URL bar and type “about:config” and then press Return.
  • The following warning might appear, “This might void your warranty!” Ignore the message and click on “I accept the risk!”
  • In the Search, field enter “network.dns.disableIPv6”
  • Among the list of preferences select “network.dns.disableIPv6” and alter its value from “false” to “true.”

Additionally, I would also suggest Firefox users to “Clear Recent History” and in the “Time Range to Clear” select “Everything.” Also, consider using cleanup tools like “CCleaner” and maybe uninstall and reinstall Firefox Browser altogether.


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