How To Fix pr_end_of_file_error

How to Fix the ‘PR_END_OF_FILE_ERROR’ Secure Connection Error? Are you searching for an answer to fix the PR_END_OF_FILE_ERROR Secure Connection error? This tutorial can help you. The increase in internet...

How to Fix the ‘PR_END_OF_FILE_ERROR’ Secure Connection Error?

Are you searching for an answer to fix the PR_END_OF_FILE_ERROR Secure Connection error? This tutorial can help you.

The increase in internet usage has been a result of the advancement of browsers. Modern browsers have interactive functions and offer a secure experience. Part of this safe experience includes make sure that websites are safe to browse. If they’re not browsers, do not allow access. However, browsers show many other errors, like 404, 502, or PR_END_OF_FILE_ERROR.

Based on Google according to Google, the most frequently searched error in browsers is 404. When you think about using the Firefox browser, the PR_END_OF_FILE_ERROR error appears to an evident error that requires fixing. What can we do to solve it?

Here are some suggestions for fixing the PR_END_OF_FILE_ERROR issue on Firefox. Before we tackle this, we must understand the root of these errors.

How to Fix Firefox PR END OF FILE ERROR in Windows 10

Mozilla Firefox Mozilla Firefox runs on a encryption algorithm or set of instructions that is used to ensure the security of an internet connection using the SSL or TLS layer. SSL or the TLS layer SSL also known as the Secure Sockets Layer and the TLS or the Transport Layer Security is a protection layer that serves to protect the connection used by the Firefox application to browse the internet. If you’re unable to access the site using the Firefox application, you might encounter PR END OF FILE error or a secure connection error. The reasons behind the failed secure connection error in your Firefox Web Browser app on your computer are described under this article.

  • VPN or proxy connectionsThe VPN or Virtual Private Network connection may hinder your browsing experience in case you try to access a restricted website within your area. If you’re using a proxy connection, you might not be able use the Firefox browser to browse the internet due to interruption.
  • Changes in the cipher variants – If you’ve attempted to alter the cipher variants within the SSL layer of the Firefox web browser, you could encounter the error “secure connection failed.
  • A corrupted web user profileCorrupt web user Profile If the web user profile that you use within the Firefox application is corrupted it could mean that you won’t be able access the internet, and you may encounter an error.
  • Interruptions caused by security softwareIf you’re using third-party security program, such as Anti-virus for your PC it could interrupt your internet browsing and cause you to receive an error.

Basic Troubleshooting Methods

Try using most basic troubleshooting techniques to fix the PR ERROR END OF FILE since the issue can be solved with a few simple changes.

Disable VPN or Proxy Connection.

If you’re using an VPN or Proxy it is essential to follow this method prior to doing any other. Follow the steps below to deactivate them.

To remove VPN application:

Step 1. Hit the Windows key and R simultaneously to open the Run dialogue box.

Step 2 Type ” appwiz.cpl‘ in the text box and hit Enter to display the menu of Programs and Features.

Step 3 This time, at the User Account Control (UAC) screen select “Yes” for the administrator rights.

Step 4 On the Features and Programs screen look for the VPN running on your PC. After you have found it, right-click it and choose Uninstall from the dialogue box that pops up on the screen.

Then, follow the onscreen instructions to remove the VPN on your PC and resolve this Secure Connection error on Firefox.

To Disable Proxy Server:

Step 1. Hit the Windows key and R simultaneously to open the run Dialog box.

Step 2- Type ‘ms-settings:network-proxy‘ in the text box and press Enter to open up the Settings app’s Proxy tab.

Step 3 In this step, scroll down to the manual proxy setup section, and turn off the switch to ‘ Use a proxy server‘.

Verify that the issue has been resolved. If not, proceed by following the next step.

Refresh Firefox browser

As it turns out this particular error is frequent in cases where users who are affected have experimented with SSL settings, which led to the implementation of encryption methods that aren’t recognized by Firefox or the site that you’re trying access.

If this is the case the only way to fix it would be to change your Firefox settings to their default setting. The good news is that the browser comes with an option that allows users to accomplish this without having to install the program again.

Here’s a short guide on updating the Firefox browser by using menu called Troubleshooting menu:

Launch you Firefox browser and then click the action button located in the upper right-hand corner on the display. Then, from the list of options available select Help Troubleshooting Info.

Accessing the Troubleshooting Information menu in Firefox

Once you’re in The Troubleshooting Information menu, go to the right-hand section and select Refresh Firefox (under Give Firefox an update).

Giving Firefox a tune-up using it’s Refresh Firefox feature

After the final confirmation prompt At the final confirmation prompt, click Refresh Firefox for the second time to initiate the process. Wait till the entire process has been completed prior to restarting your browser.

Repeat the procedure that caused the issue, and then check to see whether the same issue persisting.

Reset Firefox’s Secure Sockets Layer (SSL) Settings

Your first reaction might be to avoid this method even if you’ve not changed the browser’s SSL settings. But, it’s worthwhile to try this procedure because it’s simple to do and will solve your issue without additional work.

To change to default your SSL settings, visit”hamburger” in Firefox. Click on the “hamburger” menu within Firefox and select on the “Help” option:

From there, click the option to view more troubleshooting information. This will bring a pop-up screen open in your browser that displays various troubleshooting tips:

Click here to click the Refresh Firefox button then your web browser should re-start. This will change the security settings for SSL Check whether you are able to browse the internet at this point. If not, there’s another fix that you can try.

Disable the Domain Name System (DNS) Over HTTPS Within Firefox

In simple terms in a nutshell, Your DNS is the method you use to browse the internet using URLs like DNS on HTTPS can be described as a method to handle the DNS requests to be made via HTTPS.

The goal of the protocol is to stop machine-in-the-middle attacks and prevent malicious “eavesdropping,” but this normally helpful feature of Firefox can also cause the PR_END_OF_FILE_ERROR.

The way to do this is to turn off it. To do this, go to the Firefox preferences screen. This can be done via the hamburger menu in the browser. You might use the toolbar:

From here, ensure you’re on the General screen.

If you scroll into the Network Settings section and then click on the Settings… button to be able to access the Connection Settings:

Find the Allow DNS to HTTPS option, then remove the box. After restarting Firefox make sure to examine your browser to determine whether the error has disappeared.

Temporarily Disable Security Software

This approach is more appropriate in the case of Windows users, since Windows relies on third-party security programs.

Certain antivirus and security programs such as KasperskyBitDefender as well as ESET might consider cipher suites to be potential security threats. In this case they can stop the connection and then use their secure protocol, which results in Firefox secure connection failing error.

We suggest disabling only the real-time protection feature of your antivirus program If you can. The feature monitors your activities and snoops on your network connection right away if it discovers any security threats.

If it isn’t possible to turn it off by hand, the only alternative is to turn off the program completely. This method differs based on the software you’re using. You can generally access the settings via the dashboard or the configuration section.

After you’ve disabled the program, restart your system and attempt to access the site. If the current security software is the main cause of the issue, try to replace it with one that doesn’t trigger PR_END_OF_FILE_ERROR.


An “Secure Connection Failed” warning is a serious warning. It could make you think or the site you’re browsing (or your personal computer) has been compromised. However that’s not the case. error PR_END_OF_FILE_ERROR is typically safe and could indicate an problem with your browser or connection.

The most common causes for this error are VPN connection, also known as proxy or proxy connections, incorrect SSL settings in your browser, a damaged Firefox profile, and excessive security software. Additionally, taking steps to avoid it will mean that the instances you notice the error will be very few and far between.

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