What does the error code PR_CONNECT_RESET_ERROR on Firefox represent? Why does it repeatedly occur? How can it be resolved? Do not worry. In this guide, we will assist you in clarifying these questions step by step.

PR_CONNECT_RESET_ERROR on Firefox

The PR_CONNECT_RESET_ERROR error typically shows up in Firefox and signifies a TCP connection problem between the browser and the website server, stopping you from accessing web pages.

Generally speaking, this connection error could stem from network connectivity issues, server malfunctions, incorrect settings or extensions within Firefox, or other reasons.

Below are several strategies for dealing with the Firefox issue, and you can try them one by one until you find the solution that resolves your frustrating problem. Keep exploring.

How to Resolve the PR_CONNECT_RESET_ERROR

Method 1. Execute MiniTool System Booster

The PR_CONNECT_RESET_ERROR error on Firefox is a type of connection error, so you should first check if your Internet connection is stable. Additionally, sometimes outdated or corrupted caches in browsers can lead to similar errors. Therefore, clearing the cache on browsers is a viable option not only to fix issues but also to enhance your browsing experience.

Is there a way to achieve both tasks simultaneously? Yes, MiniTool System Booster is well-suited for this purpose.

This free software offers a set of tools to optimize your system performance and stability. Among these tools, the Deepclean feature can adjust your network connections, free up RAM, clean up browsers’ cookies, cached files, browsing history, fix registry issues, and more with just one click.

Now, I’ll demonstrate how to use MiniTool System Booster to address the PR_CONNECT_RESET_ERROR error.

Step 1. Download, install, and launch MiniTool System Booster.

Step 2. Click on Performance Home to expand the dropdown menu and then select Deepclean.

Step 3. Click on START CLEAN and it will begin running the 7 tasks sequentially.

NetBooster – optimizes hidden internet connections and repairs internet settings.

Internet Cleanup – clears out internet junk files, browsing data, etc.

Both of the above features can meet your needs in resolving the connection failure error. For the other tasks, you can run or skip them depending on your preference.

Method 2. Switch to Another Network

It's possible that the PR_CONNECT_RESET_ERROR error occurs because your current network is blocking access to the website you're trying to visit.

To confirm this suspicion, try accessing the specific website using your mobile data. If the website loads correctly, it suggests that your network is the problem, and you need to contact your ISP.

Related article: How to Troubleshoot Internet Connection? Here Are Some Tips!

Method 3. Temporarily Disable Firewalls and Antivirus

For some reason, firewalls or antivirus software might block the website server, triggering a secure connection failure on Firefox. To investigate this, you need to temporarily disable firewalls and antivirus programs and check if the issue is resolved. Follow these steps:

Step 1. Press Win S to bring up Windows Search, type Windows Security, and open it.

Step 2. Choose Virus & threat protection in the left pane > click on Manage settings > toggle off Real-time protection > click on Yes in the UAC window.

Step 3. Type Windows Defender Firewall in the search bar and open it.

Step 4. In the left panel, select Turn Windows Defender Firewall on or off > check Turn off Windows Defender Firewall (not recommended) under both Private and Public > tap on OK to save the settings.

Method 4. Disable Unnecessary Extensions and Add-ons

Although disabling extensions and add-ons on Firefox isn't crucial, this step can eliminate the possibility of these causing the PR_CONNECT_RESET_ERROR error. Let's see how to disable them:

Step 1. Open Firefox, click on the three horizontal lines at the top right corner, and choose Add-ons and themes.

Step 2. In the new page, select Extensions from the left pane > toggle off the enabled extensions under Enabled.

You can test whether the error persists by refreshing the site. If it disappears, check each extension one by one to identify the problematic one.

Method 5. Disable Your VPN or Proxy

Some websites may block traffic from a specific VPN or proxy. If you're using a VPN or proxy service, temporarily disable it to determine if it's the cause of the PR_CONNECT_RESET_ERROR on Firefox. Follow these steps:

Step 1. Press Win I to access Settings.

Step 2. Select Network & Internet > VPN > toggle off VPN that is on under Advanced Options.

Step 3. Switch to Proxy > turn off the option for Use a proxy server under Manual proxy setup.

# Additional Options

Try a different browser: You can use another browser like Edge or Chrome to visit the website and see if you can access it.

Rename cert9.db file in your profile folder: Renaming the cert9.db file storing root certificates that Firefox trusts successfully fixes the issue for someone.

Flush DNS: Flushing the DNS can sometimes resolve connection issues.

Restart your router or modem: Simply restarting your router or modem can also fix temporary glitches affecting the connection.

Related article: How to Fix SSL Certificate Error in Firefox/Chrome

Conclusion

How to fix PR_CONNECT_RESET_ERROR on Firefox? Possible solutions are detailed in this guide, and you can try them one by one. If you wish to keep MiniTool System Booster on your computer, it can also improve your PC's performance.

Please share your concerns and problems regarding MiniTool System Booster with us, and we'll respond as soon as possible.

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