Many users have reported that once they have disabled the HTTP/Port checking on their antivirus, the problem has been fixed.

Solution 3: Disable HTTP/Port Checking on the Existing Antivirus Lastly, check if the error still exists or not. And then hit OK so that you can apply the changes immediately.

Now, check the “Validate Settings Upon Exit” option.

Now, you have to set the Preferred DNS Server to be 8.8.8.8 and the Alternate DNS Server to be 8.8.4.4.

Perhaps, you have to change it only if it was something else.

Now, switch the radio buttons in the Properties window and click on “Use the Following DNS server addresses”. Then click on it and click on the Properties button.

Now, you have to locate the Internet Protocol Version 4 (TCP/IPv4).

Followed by it, click on the Properties button, only if you have admin permissions.

Once the internet connection window opens, double-click on the Active Network Adapter.

Once you have opened it, navigate to the Change Adapter Settings which is located on the left menu and then click on it.

Followed by that, click on the Network and Internet button which is at the top of the menu. Then on the right corner, you have to switch the View option to Category.

Alternatively, you can do the same by opening the Control Panel.

Then type “ncpa.cpl” and hit Enter to open the Internet Network Connection Settings.

Press and hold the Windows + R key to open the dialog box.

Then you have to start using the one that is provided by Google for free.Ĭheck out the instructions below to change the DNS address of the PC. Basically, you just have to get rid of the DNS provided by the ISP (Internet Service Provider). If the above process did not work, then you can use Google DNS. After that, restart your browser.Īfter you restart the browser, check if the error still persists or not. Also, you have to do the same but now in the Extensions or Theme tab.

Once the window appears, tap on Remove and then confirm.

Now, if you want to remove or delete any plugins, you just have to select it and then click on the three dots next to the name of the plugin.

To view the full list of the plugins, you have to click on the Plugins which is located on the right panel of the screen.

Now, navigate to the top-right part where you will find the Menu button of the browser’s window.

First, open your Mozilla firefox browser from the desktop or from the Start menu.

So if you want to fix it, then you can simply follow the listed below steps. Basically, the extension or the add-ons sometimes causes connection issues preventing you as the client which is being verified during a TLS handshake. If you have recently added any new plugin or add-ons in your Mozilla browser, then it might be the reason behind this problem. Solution 1: Disable Suspicious Add-ons in your Browser

Performing a tls handshake firefox