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For all the moving parts in a browser, as well as the many components which make up an internet connection Most users encounter very few errors when surfing the internet. However, when errors like PR_CONNECT_RESET_ERROR do appear, they can act as a roadblock, especially when the fix isn’t obvious or intuitive.

Luckily, this particular problem isn’t too difficult to fix. Actually, a lot of the solution is to toggle elements in and out to ensure that things are working. The trick is to determine which components to alter and when to do it.

With all the moving parts in the browser, and the many components that form an internet connection the majority of users encounter few errors while browsing the internet. However, when errors like PR_CONNECT_RESET_ERROR do appear, they can act as a roadblock, especially when the fix isn’t obvious or intuitive.

Fortunately, this particular issue isn’t too difficult to resolve. The majority of the solution is to toggle elements in and out to ensure that things are working. It is important to understand which components to alter and when to do it.


In simple terms, the PR_CONNECT_RESET_ERROR shows up when a browser isn’t able to connect to a server.

On the surface, it appears like it’s like other connection errors that include a range of 400 and 500 status codes. But this error can only be seen only in Firefox.

However, different browsers could suffer from the same issue on their own. For instance, Chromium-based browsers (such as Microsoft Edge, Opera, Brave as well as Chrome itself) provide an ERR_CONNECTION_RESET error instead.

Disable the Protocol Filtering (if relevant)

In the end, one reason most people will eventually be the cause of this problem is a TCP filtering of the protocol that eventually will end up causing a break in connections between peers (you) as well as the service that you’re trying to connect to.

In the majority of cases it’s due to an overprotective antivirus suite with Protocol Filtering enabled by default. This security feature ends up scrutinizing the security of all your web browser communications and will block any suspicious activities.

It’s fine when it performs as claimed. However, certain AV (most often ESET) are known to generate numerous false positives, which can stop users from accessing specific websites.

If you’re running ESET Antivirus as your default security software Follow the steps below to deactivate Protocol Filtering:

  1. Start ESET’s primary ESET anti-virus program.
  2. Access the Advanced settings manually using the key F5.
  3. Once you’re inside the Advanced set-up window, you can begin by clicking Web as well as Email.
  4. The step is to move to then the section for Protocol Filtering section and then click the slider just below to enable Content Filtering for Application Protocols to deactivate the feature.
  5. Click OK for saving the modifications and check if the issue has been fixed by attempting to access the identical website that was creating the error.
  6. Clear Browser Cache
  7. It turns out that this issue could be caused by the temporary file hindering new connections. In the majority of cases, this happens when you try to connect to the same server using both a normal connection as well as VPN. VPN.
  8. If this is the case to your particular situation, you could resolve the issue by clearing the Firefox web cache. Here’s a quick guide on how to do this in order to fix the PR_CONNECT_RESET_ERROR :
  9. Note: If you are aware precisely which file is the culprit behind the problem, follow these steps to remove the cache from one website.
  10. Make sure that every Firefox tab closes, apart from one new tab we will make use of.
  11. Select the Action button (top-right right-hand corner) and then select the option from the newly opened context menu.
  12. If you’re able to get into your Setting menu, click on the privacy & Security menu on the left side of the table. Then, scroll down to the Cookies and Data menu and then click Clean data.
  13. Within the Clear data menu, begin by unchecking the box that is associated by Cookies or Site Data Make sure you tick that box beside Cached Web Content.
  14. Click Clean to start the process of cleansing your data from your website.
  15. Restart your PC and check whether the issue is fixed when the system starts again.

Eliminate the Proxy Server

  • Press the Windows keys and R to display the Run dialog box.
    Type ms-settings:network-proxy inside the text box and press Enter to open up the Proxy tab.
  • This is the settings app.
  • Scroll down towards and then the manual proxy setup section.
  • Go to the right-hand side of the screen. Turn off the toggle that is associated with the Proxy server.
  • Restart your computer, and then let the process finish.
  • Examine if the issue has occurred.

Temporarily Disabled Antivirus Program

Third-party antivirus software may cause problems when trying to connect to an HTTP server with the Firefox browser. Try temporarily disabling the antivirus software and see whether the error message will be resolved.

If you disable the antivirus program and the issue has been resolved it is recommended to switch to another antivirus program or install it again. Be sure to turn on antivirus once more to ensure that your computer is secure from threats and viruses.

For Windows Defender:

  • Simply click on the Start or Windows logo key, which is located in the lower left
  • Click the Settings icon which appears to be a gear, and open the Windows Settings section.
  • In the Windows settings, click Update and Security.
  • Click Windows security in the left side of the screen.
  • Click on Virus and Threat Protection in the section on protection. A new window appears.
  • In the new window, select Manage settings from the Virus and Threat Protection settings.
  • Switch off real-time protection.
  • Start your PC.


  • Double-click on the AVG icon that is located on the your system tray
  • Click Temporarily deactivate AVG protection.
  • Select the time for which you wish AVG to be disabled and if you would like AVG to be able to turn off its Firewall as well. Click OK to deactivate AVG’s antivirus program.

To McAfee:

  • Double-click on the McAfee icon that is located on your system tray.
  • Click Exit.
  • A pop-up window will inform you that McAfee’s protection will be disabled, click Yes to turn off the antivirus program.

For Avast:

  • Double-click the Avast icon in your computer’s system tray.
  • Click Avast shields control.
  • Choose the option to disable the program. The choices are to turn it off within 10 minutes or an hour, until your computer is rebooted, or for a set period of time (until you decide to restart it). Choose the option that suits your needs best and then use it to turn off the program.


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