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Website Visitors’ Guide on How to Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox

Warning: Potential Security Risk Ahead’ Error in Firefox




If you’re seeing any of the above security warnings while visiting a website on the Mozilla Firefox browser, this article will guide you through seven ways you can still use the site despite receiving any of these error messages.

However, there are some things you should know before applying these tricks:

  • This article is intended for website visitors. If you’re a website owner, please click on the particular error message above you are seeing for your website and follow the different set of steps mentioned in those articles.
  • As a website visitor, you can’t solve the error, but you can force your browser/operating system to ignore it.
  • Follow these solutions only when you are absolutely certain that the website, you’re visiting is safe.

Before we begin, make sure the date and time on your device are accurate. For computer users, you can see this information displayed on the right side of your task bar at the bottom of your screen. Incorrect date/time settings can cause a variety of errors. If it’s not set properly, right-click on the date/time and select Adjust time/date. Set the right time and date there.

Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox

Fix the “Secure Connection Failed” Error in Mozilla Firefox

These tricks will help you to get rid of the “SEC_ERROR_EXPIRED_CERTIFICATE,” “MOZILLA_PKIX_ERROR_SELF_SIGNED_CERT,” and “SEC_ERROR_REVOKED_CERTIFICATE” errors in Firefox.

You don’t necessarily need to perform all of these tricks. Just keep applying them one by one until the error message no longer displays. 

1. Permit Firefox to Trust Root Authorities

Firefox has an optional feature that allows the browser to trust root authorities in the Windows certificate store. To activate this feature, you must enable the setting in your browser.

Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox
  • Type “about: config” into the Firefox address bar.
  • Press the I accept the risk! button.
  • Search for security.enterprise_roots.enabled.
Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox
  • In the security.enterprise_roots.enabled window, look to the right side of the screen. If the value is False, double-click on it. The value will get changed to True.
  • Restart Firefox.
  • If you still see the error message, move to the next solution.

2. Change Your Security Settings

  • Type Command Prompt or CMD into the Windows search bar.
  • Right-click on Command Prompt and select Run as Administrator.
Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox

Type in these three commands, hitting Enter after each one:

Regsvr32 softpub.dll

Regsvr32 Wintrust.dll

Regsvr32 Wintrust.dll

Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox
  • Reboot your computer. The changes will be saved.

3. Clear Your Browsing History

  • Open Firefox and navigate to Options in the top-right drop-down menu.
  • Go to Privacy and Security from the menu bar on the left side.
  • Click on Clear Data in the Cookies and Site Data section.
  • Select Clear History.
  • Select all the options and click on Clear Now.
Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox

Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox

4. Temporarily Disable Your Antivirus and Firewall

Some antivirus and firewall solutions are sensitive to SSL errors. To address this issue, all you need to do is turn off HTTPS scanning. All antiviruses have different SSL scanning under different names. Find the appropriate setting such as “HTTPS Scanning,” “Scan SSL”, “show safe result,” “Do not scan encrypted connections,” etc.,and disable it.

If you don’t see any such options, visit the manufacturer’s help section and try to find SSL- and HTTPS-related settings information there.

5. Clear the SSL State

  • Search for Internet Options in the Windows search bar.
Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox
  • In the pop-up window, select the Content tab.
  • Click on Clear SSL State to clear your SSL cache.
Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox

6. Add the Site to Your List of Trusted Sites

  • Search for Internet Options in the Windows search bar.
  • In the pop-up window, click on the Security tab.
  • Select Trusted sites.
  • Click on the Sites button to open a new window.
  • Manually add the URL of the website that is displaying the error message.
  • Click Apply and OK.
Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox

7. Continue With an Insecure Connection

If none of the above works, you can continue with the insecure connection at your own risk:

  • Click on Advanced.
  • Click on Accept the Risk and Continue.

Note: This trick will not work for the “SEC_ERROR_REVOKED_CERTIFICATE” error.

Fix the ‘Warning: Potential Security Risk Ahead’ Error in Firefox

5 Ridiculous (But Real) Reasons IoT Security is Critical


“Why would I need a digital certificate for my toaster?” Let us tell you.

The Internet of Things (IoT) is growing exponentially. Each day more and more devices are coming online, which opens up new attack vectors for enterprising hackers and cybercriminals. On its face it might sound silly that you need to secure your thermostat or a FitBit. You would be wrong.

Let’s examine the FitBit example, using geolocational metadata foreign intelligence services were able to locate several US black sites thanks to the routes the soldier were taking while they jogged around the perimeters of the camps.

Granted, most IoT exploits don’t have the potential to be a matter of life or death like compromising the location of a black site would, but that doesn’t mean the threat shouldn’t be taken seriously.

Here are five ridiculous (but real) reasons why IoT security is critical in 2018.

Your IoT devices can tell people a lot about you and your property

iot devices and location tracking
Many of your IoT devices (your car, your activity tracker, etc.) keep data on where you are and what you’re doing.

This ultimately comes down to privacy, most IoT devices need to make contact with an application server somewhere at regular intervals, in addition to possibly reaching other endpoints. And vice versa. You need those connections to be secure or else the device will be transmitting everything in plaintext and it would be trivially simple to eavesdrop on those connections.

You may be asking, “yeah but what is somebody going to learn from my thermostat and smart lights?”

How about whether you’re home. The more unsecured devices you have, the more data points an attacker has. Think about how much information could be harvested from eavesdropping on connections with your car, your smart home, anything that’s online.

Quantum physics, man

Quantum computing is still about 8-10 years from being truly viable. But it’s going to arrive before a lot of these devices have finished their lifecycles. So not only do you need a digital certificate for your IoT devices now, but you also need one that’s going to be quantum-proof when the technology finally matures in about a decade.

Typically, that comes in the form of digital certificates that are underpinned by two algorithms, a modern algorithm like RSA and a quantum-proof algorithm for down the road. This is going to be important because quantum computers will be able to crack RSA encryption easily and that’s going to render most current IoT certificates obsolete. So, it’s not just about having a digital certificate – preferably one with a long validity period – on your IoT devices. You need the right one. One that will withstand the inevitable threat of quantum computing.

Because eventually, the IoT is going to rise up and kill someone

While it’s unlikely to be a Skynet-level rebellion, as more and more critical systems come online—the stakes continue to rise. Not even ten years ago, the US and Israel “allegedly” collaborated on the Stuxnet virus, which physically overheated Iranian nuclear centrifuges as part of a campaign to stunt its nuclear ambitions. Recently there have been attacks on power grids and other physical infrastructure that are connective.

It’s only a matter of time before a connected device is hacked with lethal repercussions. The best way to stave off this reality a little longer is with strong security for our IoT devices—at least off the assembly line. While there’s no accounting for what kinds of threats and attacks will present themselves in the future, there’s no excuse for not manufacturing them to be optimally secure in the now. Unfortunately, not all manufacturers adhere to this mindset, so sometimes an aftermarket fix needs to be applied. Either way, we can’t afford to leave these devices unsecured.

These devices will have long lifespans

While we swap out our phones at regular intervals, other IoT devices could be in service for years to come. People don’t swap out their refrigerators and thermostats quite as frequently. That means that these devices need to be fully secured for now, and with as much as much of an eye toward the future as possible.

As we discussed earlier, part of that is accounting for the incoming quantum threat. But there are other considerations that need to be made too. Strong configurations that only support the latest algorithms and protocols are a must, as is having a mechanism to potentially make updates to these devices down the line. The latter isn’t always feasible given that some vendors are loathe to include that kind of functionality in their devices, but if it’s available make use of it.

Because your devices could be working for someone else

You wouldn’t let someone come into your house and exploit your family’s labor for their own profit, so why would you want that to happen to your appliances and devices? People wonder what a hacker would want with their IoT devices – it’s their computing power. No, the ability to make ice isn’t all that attractive to cyber criminals, but the processing power that can be harnessed as part of a botnet.

Cybercriminals hack thousands of devices and build a botnet of devices they can control with a few clicks. This gives them the power to:

  • Launch DDoS attacks against websites and computer systems
  • Hack other computers while making it look like the hacker was at your house
  • Mine cryptocurrency to make money
  • Hide their identity by routing messages and internet traffic through the botnet

Build a botnet big enough, and you have a chance to make some decent revenue in cryptocurrency. This is not what you purchased these devices for. While this activity, called cryptojacking, may not result in latency that is THAT noticeable, it’s still an invasion and unauthorized use of your device. Don’t walk into your kitchen and have to ask, “are you mining bitcoin again, refrigerator?”


“What have I told you about that?”

It might sound crazy, but IoT security is hardly a joke.