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Home ›› Blog ›› Troubleshooting ›› How to fix the "Secure Connection Failed" error message in Mozilla Firefox

How to fix the "Secure Connection Failed" error message in Mozilla Firefox

If you're getting that annoying "Secure Connection Failed" message which prevents you to visit a given website that's using HTTPS, it might be that your security software has a problem with TLS 1.3.

Fixing this message involves changing the "security.tls.version.max" Mozilla Firefox configuration setting from 4 to 3.

Here it is how!


1) We're starting from this error message:

Secure Connection Failed

The connection to the server was reset while the page was loading.

The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
Please contact the website owners to inform them of this problem.

Try Again

Which should look like this:

How do I fix the Secure Connection Failed error in Mozilla Firefox - THE PROBLEM


2) Copy the below line and paste it in your Mozilla Firefox address bar:

about:config



Your Mozilla Firefox address bar should look like this:

How do I fix the Secure Connection Failed error in Mozilla Firefox - LOADING ADDRESS


3) You will get this warning message:

This might void your warranty!



The only option that you are given is:

"I accept the risk!"



To move to the next step you will have to click it!

How do I fix the Secure Connection Failed error in Mozilla Firefox - WARNING MESSAGE



Once you press that blue button, you're going to be taken to the configuration panel, which should look like this, but with lots of options:

How do I fix the Secure Connection Failed error in Mozilla Firefox - WARNING MESSAGE


4) Find the "security.tls.version.max" setting that we want to change

You should copy and paste the below line on the configuration panel search field:

security.tls.version.max

How do I fix the Secure Connection Failed error in Mozilla Firefox - SEARCHING FOR THE SETTING



This is the setting:

How do I fix the Secure Connection Failed error in Mozilla Firefox - THE SETTING


5) Changing the "security.tls.version.max" setting from "4" to "3"

What we have to do is to change the setting:

security.tls.version.max

From the value "4" to the value "3".



In order to do that, you should double-click on the "security.tls.version.max" setting and you will get a small input field where the value "4" is provided.

How do I fix the Secure Connection Failed error in Mozilla Firefox - THE SETTING VALUE 4

Change that value to "3".

How do I fix the Secure Connection Failed error in Mozilla Firefox - THE SETTING VALUE 3



The "security.tls.version.max" setting should look like this:

How do I fix the Secure Connection Failed error in Mozilla Firefox - THE MODIFIED SETTING



This should fix the error message!

Go ahead and test it!

Enjoy,
Mihai Bocsaru

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