If you have been encountering the “network protocol error” in Firefox, don’t worry – your problem is a common one. We too were experiencing this issue with some of our customers. In this article, we have managed to lay down solutions that might resolve these issues and eradicate them completely in the future!


What are the results of Network Protocol Error Firefox Issue?

After having to investigate the issue in detail, we concluded that the following must be the paramount reasons due to which it occurs.

  • Outdated Browser: Though you do your best to keep track of updates for various programs on your computer, it is always possible that the browser that you are using was not updated in a while. This means that the network protocols may have changed which can cause issues. To correct this error, we suggest updating your browser, and then checking to see if doing so fixes any issues.
  • Corrupted Cache: In certain cases, the cache on your browser might have gotten corrupted over time and can lead to errors. Therefore, we suggest that you try to clear out this cache as soon as possible so that you can get rid of the error!
  • Incorrect Configurations: If the browser has been improperly configured, you will run into issues that run the risk of the client being unable to browse the hosting site. Therefore, we suggest that you follow this troubleshooting guide below in order to ensure proper configurations of its settings.

Now that we have taken you through most of the reasons behind it, we can finally start implementing the solutions.

Read this carefully before you start:

Some users may encounter a connection error. This could be due to router malfunction or there might be an issue with the ISP server. Restarting the router and waiting for it to stabilize should rectify this problem. If it still persists, try to access different web pages as well as try connecting again but if your efforts cross the time limit set by the support agents then call up your ISP’s helpline for help.

Reportedly, some users have reported as error on their PC. They were able to access HTTPS sites but not HTTP sites (like Yahoo, Facebook and Google). This happened after they renewed their subscription to McAfee. Firefox was unable to load the pages. There were thousands of such incidents where the customer care team had removed or uninstalled extensions or plug-ins from browsers. It is then verified that only these browser extensions or plug-ins that do not work with McAfee in their computers

To fix Network protocol error Firefox completely follow these steps:

Solution 1: Use Alternate Browser:

Whenever you encounter an error on a website, try opening it on another browser or computer. If you don’t get any errors on another browser or operating system, it might be an issue with your Firefox browser. The rest of this tutorial will provide solutions that could fix your problem.

Use Alternate Browser

Solution 2: Update Firefox

Sometimes, it may appear that an update was unsuccessful when in fact the process took place smoothly. However, it’s best to make sure you have the latest version of Mozilla Firefox browser at all times. To do this:

  1. Firstly, launch Firefox, navigate to the “Options” menu and select the option “Settings” located at the bottom of the options menu.Update Firefox
  1. Type “Update” in the search box and then click on the “Check for Updates” optionUpdate Firefox
  1. The browser will check for the latest updates and afterwards it’ll let you know if any updates are available. If any updates are available then follow the on-screen instructions to install them on your system.



 Solution 3: Clear Firefox Cache 

Cookies and temporary internet files can sometimes take up quite big storage space in the browser’s cache memory which results in this error. Follow the instructions given below to successfully clear cache memory:

1.Launch Firefox. Navigate to the Options menu, which is located in the top right corner of your browser window.

2.In the Settings menu, click on the Privacy and Security option in left pane.

3.Scroll down the window and click on the “Clear Data” option located under the Privacy heading.

Update Firefox

4.Under the Privacy menu in your Chrome Settings, click Clear browsing data. From the dropdown menus, choose Cookies and Site Data and Cached Web Content, and then click Clear.

5.Finally, close the Firefox window and relaunch it again – hopefully your problem will be resolved by now but you can try the next potential fix if this doesn’t work.


Solution 4: Reload Firefox Webpage

Refreshing the webpage can resolve errors pertaining to the Firefox Network Protocol Error. Follow the steps below:

1.To open a new tab, click Ctrl + T as shown below or hover over the plus icon and click .

2.Performing this step will help prevent your browser in storing the site’s images, which means that each time you try to access it again, Firefox will do all the work of loading it directly from the original source, and that means you’ll be getting a much faster browsing experience.

Solution 5: Launch Firefox in Troubleshoot Mode

Firefox has a built-in troubleshoot tool that you can use to diagnose bugs and errors and potentially provide a solution for them. Launching Firefox in troubleshooting mode is the same as launching it without any extensions or add-ons installed (for example, if you’re having trouble with an extension, theme or Add-On). In order to launch Firefox in troubleshooting mode follow these instructions!

1.Firstly, launch Firefox, navigate to the “Options” menu and select the option Help” located at the bottom of the options menu.

2.In the Firefox Help section, click on the “Troubleshoot” option

Network Protocol Error Firefox

3.After you received a prompt message window with the warning message “Your extensions, themes, and custom settings will be temporarily disabled” click on the “Restart” option.

Launch Firefox in Troubleshoot Mode 1 Best Method to Easily Fix Network Protocol Error Firefox

4.Here, you can compare different web pages to see if the same error is still occurring.

Solution 6: Temporarily Disable Antivirus

Many internet security programs offer some form of web protection to users against harmful websites. One way to counter the “Your PC might be at risk” error is to turn off this feature by following the below-mentioned procedure:

1.Navigate to the “Show Hidden Icons” option on the right side of your task bar. Locate your antivirus software and right-click on it.

  1. To prevent any interruptions while conducting an “Online Repair” of your PC, it is important to Disable the Antivirus and set the firewall Pause mode.Temporarily Disable Antivirus

3.We warn you that once you opt for removal, the process cannot be undone.

4.Now that the antivirus has been disabled, launch your Firefox browser and see if the issue is resolved!

Solution 7: Reset the TCP/IP Protocol

Due to a bug in the Windows update, you will end up with an error message that says: “TCP/IP has stopped working”. Here’s how to fix it.

  1. Click on the Start button. Click Search, type “Command Prompt” in the search bar, right-click Command Prompt, and select run as administrator.Reset the TCP/IP Protocol

2.Now type the below-mentioned command in the command prompt window.

Capture10 Best Method to Easily Fix Network Protocol Error Firefox

  1. Finally, restart your computer and launch the browser. If you’re still having issues, try rebooting your router. If that doesn’t work check for firmware updates, otherwise it might be a browser issue (or you could have a ghost in your machine).


Solution 8: Clear the DNS Cache

1.Click on the Start button, type “cmd” in the search bar, and press Enter.

Clear the DNS Cache

2.Now type the following command in the Command Prompt window:

Clear the DNS Cache

3.When you have finished, a message will display saying “Windows IP Configuration: Successfully flushed the DNS resolver cache”.

Clear the DNS Cache

4.Now restart your computer, launch the browser and check if the error is resolved.

Solution 9: Change the Network Profile

If the windows network profile is set as “Public”, then the user can face this problem. Follow the guidelines given below to alter the network profile from Public to Private.

  1. To access the “Settings” menu, begin by clicking on the “Start” icon.
  2. Locate the “Network & Internet” option, then click on it and change connection properties.
  3. Change the Network Profile
  4. In the newly opened window, below the “Network Profile” section, mark the option “Private”   Change the Network Profile
  1. Now proceed the computer, discharge the browser, and notice if the issue is solved

 Solution 10: Edit Firefox Configuration Settings

  1. Dispatch Firefox and write the following keyword in the address bar: Edit Firefox Configuration Settings

Note: A warning page will appear in front of you and from there click the “Accept the Risk and Continue” button.

: Edit Firefox Configuration Settings

  1. In the neighboring screen, search the following phrases on twitter:: Edit Firefox Configuration Settings
  2. You can toggle the feature on and off by clicking on the Toggle button on the right side of the window.

Solution 11: Refresh Firefox

Refreshing Firefox removes all the extensions and customizations from your browser. Follow the instructions given below to successfully refresh Firefox:


  1. First launch your Firefox browser and navigate to the Help menu. Now, select “About Firefox” from the drop-down.

Refresh Firefox

  1. Within the Firefox Help section, click on “More Troubleshooting Information.” Then, click on the Refresh Firefox button near the bottom of your screen.
  2. Sometimes you need to forget everything you know in order to start fresh. When performance issues load up, this might happen to you sooner or later, and when it does – don’t worry! Just ignore the warning window and press CTRL + SHIFT + R. This will refresh Firefox so that you can start anew, with no worries about losing your essential files and settings because all of them are backed up automatically by the latest version of Firefox!
  3. Finally, relaunch Firefox and check if the issue still persists.

 Solution 12: Reinstall Firefox Browser

If none of the above-mentioned solutions work for you, consider performing a fresh reinstallation of the Firefox browser. To learn how to do this effectively, please follow these instructions:


  1. Click on the Windows Start Menu, type the control panel in the search box, and then click on the “Control Panel” Reinstall Firefox Browser
  2. The Control Panel window will appear in front of you and in the right portion, scroll down until you see the “Programs and Features” option.Reinstall Firefox Browser
  3. In the search box, type Firefox, then select the file and click on the “Uninstall” optionReinstall Firefox Browser
  4. Install the Firefox browser by following the on-screen instructions and check if the issue is resolved.