How to fix PR_END_OF_FILE_ERROR in Mozilla Firefox

What is PR_END_OF_FILE_ERROR

The PR_END_OF_FILE_ERROR is a Firefox-specific error that occurs when the browser can’t establish a secure connection with a website. This error can be caused by several factors, including VPN or proxy connections, incorrect SSL settings in your browser, a corrupted Firefox profile, and overzealous security software. Another possible cause is an incorrect or unstable network connection. The error occurs when Firefox isn’t able to establish a secure connection to a site due to the browser’s “cipher suites” failing. In other words, it’s reached the end of the file containing the cipher suites and none have worked (hence the error name). It is generally harmless and more likely indicates an issue with your connection or browser. The PR_END_OF_FILE_ERROR only happens on Mozilla Firefox, which means you won’t see this in Safari, Chrome, Opera, or Edge. If you’re experiencing the PR_END_OF_FILE_ERROR in Mozilla Firefox, there are several things you can try to fix it. Here are five methods that may help:

Before implementing our instructions try few simple methods to fix an issue:

• Turn off any VPN service you are using.
• Disable any anti-virus software you are using.
• Restart internet connection (turn off and turn on your router).
• Disable unnecessary browser extensions from Firefox.

1. Reset Firefox Secure Sockets Layer (SSL) Settings

One possible cause of the PR_END_OF_FILE_ERROR is an incorrect or corrupt browser profile. To fix this, you can try resetting the Firefox Secure Sockets Layer (SSL) settings. Here’s how:

1. Open Firefox and click on the menu button.
2. Click on Options.
3. Click on Privacy & Security.
4. Scroll down to the Certificates section and click on View Certificates.
5. Click on the Authorities tab.
6. Click on Import.
7. Browse to the location of the certificate file and click Open.
8. Check the boxes to trust the certificate to identify websites and to trust the certificate to identify email users.
9. Click OK to close the Certificate Manager.
10. Restart Firefox.

2. Disable DNS Over HTTPS in Firefox

DNS over HTTPS (DoH) is a feature that encrypts DNS requests to hide your browsing data from anyone on the network path between you and your nameserver. However, it can also cause the PR_END_OF_FILE_ERROR. Here’s how to disable it:

1. Open Firefox and click on the menu button.
2. Click on Options.
3. Click on General.
4. Scroll down to the Network Settings section and click on Settings.
5. Scroll down to the Enable DNS over HTTPS option and deselect it.
6. Click OK to save your settings.

3. Create a New Firefox Profile

Creating a new Firefox profile can help fix issues with your current profile. Here’s how to create a new profile:

1. Close Firefox.
2. Press the Windows key + R to open the Run dialog box.
3. Type firefox.exe -P (without the quotes) and press Enter.
4. Click on Create Profile.
5. Follow the prompts to create a new profile.
6. Once the new profile is created, select it and click Start Firefox.

4. Disable Proxy Server in Firefox

If you’re using a proxy server in Firefox, it may be causing the PR_END_OF_FILE_ERROR. Here’s how to disable it:

1. Open Firefox and click on the menu button.
2. Click on Options.
3. Click on General.
4. Scroll down to the Network Settings section and click on Settings.
5. In the Connection Settings window, select No proxy.
6. Click OK to save your settings.

5. Disable Proxy Server in Windows

If you’re using a proxy server in Windows, it may be causing the PR_END_OF_FILE_ERROR. Here’s how to disable it:

1. Press the Windows key + R to open the Run dialog box.
2. Type inetcpl.cpl (without the quotes) and press Enter.
3. Click on the Connections tab.
4. Click on LAN settings.
5. Deselect the Use a proxy server for your LAN option.
6. Click OK to save your settings.

Hopefully, one of these methods will help you fix the PR_END_OF_FILE_ERROR in Mozilla Firefox. If none of these methods work, you may want to try refreshing Firefox or seeking further assistance from Mozilla support.