Firefox Slow Performing TLS Handshake

Error 491 Play Store
Error 491 Play Store

How to Fix the Mozilla Firefox for Windows ‘Performing a TLS Handshake’ Error?

The error message “Performing a TLS Handshake” can be seen here: “How to Fix the Mozilla Firefox for Windows ‘Performing a TLS Handshake’ Error? ”

When you try to load some websites using Mozilla Firefox for Windows, you may see an error message that reads “Performing a TLS Handshake.” This is a normal part of the process.

Your web browser and the destination website you’re seeking to connect to engage in what’s called a TLS handshake, which is a secure data exchange. Since it is utilised by HTTPS, you will most likely encounter it when connecting to an HTTPS website because of this. Because so many individuals have been thinking about and working on this problem, finding a solution shouldn’t be too difficult. Continue reading in order to gain access to all of these strategies within one convenient article!

Why does Firefox for Windows fail to perform a TLS handshake?

There are a number of potential causes for your browser to become unresponsive during the TLS handshake. Have a look at the various causes that we have listed down below!

Solution 1: Disable Recent Suspicions Addons

Add-ons installed more recently: This problem may have been caused by extensions and plugins installed more recently. It is not necessary for an add-on to be malicious for it to cause this issue; however, if it is detected, it should be removed from the system.
When you open a website, standard tests and inspections are conducted; however, the HTTP(S) checking functions of this tool enable you to run additional checks and inspections. As a result of this, we strongly suggest turning off certain functions in your browser.
IPv6 and DNS: There have been reports of users having problems with their IPv6 connectivity or their DNS address. In that scenario, turning off IPv6 and resetting your DNS address should be enough to fix the problem.
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Solution 1: Turn off any add-ons related to recent suspicions
There is a possibility that recent modifications made to your Mozilla Firefox browser have caused connection problems, which prohibit you from being confirmed during a TLS handshake. Remove any add-ons that can raise security concerns that you may have installed in the recent past.

To launch Mozilla Firefox, either double-click the icon that’s located on your desktop or look for it in the Start menu.
Add-Ons can be accessed by selecting the Menu icon located in the upper right hand corner of the browser.
To view all of the plugins that have been installed, navigate to the right pane of the screen and select the Plugins option. To uninstall a plugin, select it and then click the three dots to the right of its name.
Remove should be selected from the context menu, and the deletion should be confirmed. If you get a notification that says “Restart now,” click that. Start the procedure over, but this time choose Extensions or Themes as the option.
You can try restarting your browser to see if it helps fix the problem.

Solution 2: Use DNS Google

Users have claimed that they were able to resolve the issue by switching from their existing DNS provider to the free DNS service offered by Google. DNS problems can cause the TLS handshake to be delayed. In order to change the DNS address of your computer, follow the steps below!

Simply hit the Windows key and the letter R on your keyboard to bring up the Run dialogue box, and then select the Internet Connection Settings option from the list. In the text field, type “ncpa.cpl,” and then click the OK button.
You also have the option to manually open the Control Panel. Alter the View by option at the upper right of the window to Category, then choose Network & Internet from the drop-down menu that appears. Simply clicking the button located in the menu’s left-hand column will launch the Network and Sharing Center.
When the Internet Connection box appears, double-click on your active network adapter (the connection to the Internet), and if you have administrative capabilities, select Properties from the drop-down menu that appears.
Find the entry that corresponds to TCP/IPv4 on the list. To select it, click on it, and then select the Properties option from the drop-down menu.
Then, in the Properties window, if the radio button for “Use the following DNS server addresses” wasn’t previously selected, you need to make that modification. is the IP address of the alternative DNS server.
To save the changes, make sure the box labelled “Validate settings upon exit” is checked, then click the OK button. Check to see if the Firefox window that says “Performing a TLS Handshake” is still frozen!
Remove HTTP/Port Checking from Antivirus Software is the Third Possible Solution.
The process of obtaining files from the servers is slowed down because your antivirus software is assessing the site’s certificates. This causes the “Performing a TLS Handshake” notification to become stuck in Mozilla Firefox.

Solution 3: Remove HTTP/Port Checking from Antiviruses

The methods below will guide you through locating the HTTP or Port scanning settings in a variety of typical third-party AV applications that are responsible for producing this problem.

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You may either search for it in the Start menu or double-click the symbol for the antivirus programme that is located in the system tray (bottom right of the window).
The HTTPS scanning feature is implemented differently by different antivirus programmes. Nevertheless, the following are some straightforward suggestions on how to locate it in the most of the industry’s leading antivirus tools:
Home >> Settings >> Additional >> Network >> Encrypted connections scanning >> Do not scan encrypted connections Kaspersky Internet Security: Home >> Settings >> Additional >> Network
Home >> Settings >> Components >> Online Shield >> Enable HTTPS Scanning is where you’ll find this option in AVG (uncheck it)
Enable HTTPS Scanning may be found in the Avast menu under Home >> Settings >> Components >> Web Shield (uncheck it)
Enable SSL/TLS protocol filtering can be found under ESET’s Home menu >> Tools >> Advanced Setup >> Web and Email (turn it off)
Verify that you are no longer prompted with the “Performing a TLS Handshake” warning while attempting to download the file. If the issue continues to occur, you should look into switching your antivirus software or firewall, especially if the one you’re using is free.

Solution 4: Disable IPv6

A number of users have reported success after blocking connectivity to Internet Protocol version 6 on their own computers; this is a straightforward solution. Because of this, utilising this method during the troubleshooting process is beneficial, and you should do so.

In order to open the Internet Connection settings item in Control Panel, type “ncpa.cpl” into the box and then click the OK button.
You can also manually open the Control Panel if you choose. Clicking on Network and Internet in the top right corner of the window will allow you to change the View. To access it, you’ll need to click the icon labelled “Network and Sharing Center.” Find the button labelled “Change adapter settings” on the left side of the menu and click it.
In the box labelled “Internet Connection,” double-click the Network Adapter that is currently active on your computer.
After that, pick the Properties menu item, and then search the list for IPv6. Turn off the checkbox, then click the OK button. Restarting your computer will allow you to verify that the changes took effect and determine whether or not the issue has been resolved.

User Questions:

In order to correct the TLS handshake in Firefox
Select Options from the drop-down menu of Firefox.
Navigate to the Advanced > Encryption menu option.
Deactivate the box labelled Use TLS 1.0 and SSL 3.0.
Select the OK button.
Attempt to reopen Firefox.
How can a broken TLS handshake be fixed?
by August 2020.) A problem on the client’s end may result in the SSL/TLS handshake being unsuccessful in some circumstances. Some may appear to be unimportant, such as keeping your web browser up to date or ensuring that the clock on your computer is accurate.

This issue is typically brought on by your antivirus software performing an analysis of the certificates used by the websites you visit. As a result, the process of requesting data from servers is made more cumbersome, which is what causes the “Performing a TLS Handshake” message to remain visible in Mozilla Firefox.

See this page for more information on how to fix the SEC ERROR OCSP INVALID SIGNING CERT error.
What does it mean when a TLS handshake is performed?
The beginning of a communication session that is encrypted using TLS is signalled by a TLS handshake. The two parties that are talking with one another do a TLS handshake, in which they send each other messages to acknowledge, verify, and agree on encryption algorithms as well as exchange session keys.

What are the steps to configuring TLS in Firefox?
Enter about:config followed by the enter key.
When you want to search, type tls. Double-clicking the entry will lock it down for you. tls.version.min.
To make TLS 1.2 the default protocol, set the integer value to 3, which is the default value.
After you have finished using Mozilla Firefox, start it back up again.