If you see a Warning: Potential Security Risk Ahead message, you may: Contact the website owner and ask them to correct their certificate. Click Go Back (Recommended), or visit a different website. If you are on a corporate network or using antivirus software, reach out to the support teams for assistance.
Turn off / Disable Firefox “Warning: Potential Security Risk Ahead” Type about:config in the address bar and press Enter. A warning page may appear. Click Accept the Risk and Continue.
"Security Warning" is a fake error message displayed by a malicious website that users often visit inadvertently - they are redirected by various potentially unwanted programs (PUPs) that infiltrate systems without permission (the "bundling" method).
For websites that are securely encrypted (the URL begins with "https://"), Firefox must verify that the certificate presented by the website is valid. If the certificate cannot be validated, Firefox will stop the connection to the website and show a "Warning: Potential Security Risk Ahead" error page instead.
To fix this, you need to visit the settings option of whichever security software you are using and locate the SSL scanning feature of the software. Once you find it uncheck the box that indicates if it is enabled. Once you disable this feature on your security software, you should try visiting the website again.
On websites which are supposed to be secure (the URL begins with "https://"), Firefox must verify that the certificate presented by the website is valid. If the certificate cannot be validated, Firefox will stop the connection to the website and show a "Your connection is not secure" error page instead.
The "Access Denied" message with a Reference# is characteristic of a perimeter security system/Web Application Firewall designed to prevent bot and other suspicious connections to the website.
The Google Security Warning is a fake alert issued by malicious websites designed to trick users into making an unsafe decision online (like giving away sensitive information). While Chrome and Android devices have security alerts, they aren't labeled as “Google Security Warning”.
The Message Bar displays security alerts when there is potentially unsafe active content (such as macros, ActiveX controls, data connections and so on) in the file that you want to open.
An SSL certificate error occurs when the browser cannot verify the SSL certificates returned by the server. When the error happens, the browser blocks the website and warns the user that the website cannot be trusted as shown below. These warnings will negatively impact the user's trust in your website.
Chosen solution
Your 'logged-in' status is stored in special cookies. If the cookie is removed, you are logged out. You may be in Private Browsing mode or told Firefox not to remember. Type about:preferences#privacy<enter> in the address bar.
Increase Your Tracking Protection
Go to the main menu and select Preferences. Go to the Privacy & Security tab, then scroll to the Enhanced Tracking Protection section. Firefox is set to Standard protection by default. If you want more control, scroll down and select Custom.
In the Menu bar at the top of the screen, click Firefox and select Preferences. Click the menu button. and select Settings. Go to the Privacy & Security panel.
This can be anything from a changed URL to an issue with the server that hosts the website. A “you don't have permission to access on this server” error usually appears when your browser uses different proxy settings than your computer, which can happen when you're using a proxy or a VPN tool.
Try clearing Firefox's cookies and cache
to open the menu panel. In the Time Range to clear: drop-down, select Everything. Below the drop-down menu, select both Cookies and Cache. Make sure other items you want to keep are not selected.
Stealing sensitive information: Anytime you visit a website with a "Not Secure" warning, all the data and sensitive information sent to that site can be stolen or modified. So take caution before entering personal details on an unsecured websites, such as passwords and credit cards, because attackers could steal them.
This is due to an issue with security certificates, and many times is not the fault of your computer or your web browser at all. These certificates are what websites use to prove they are who they say they are on the internet, and if your browser detects an issue with a certificate, it will issue a warning.
These dangerous sites typically resemble legitimate websites, and your computer can be attacked by simply visiting a malicious website. You may be prompted to download software that your computer appears to need. A hazardous installation can compromise your machine, and your sensitive information as well.
What does 'Your connection to this site is not secure' mean? In Chrome, this message appears when clicking on the "Not Secure" in the browser bar when on an HTTP site. It means that the website does not have an SSL certificate and does not use SSL/TLS for encrypting traffic to and from the site.