Firefox error ssl_error_handshake_failure_alert

If you encounter an error while using Firefox or if you encounter any other problems while using this browser, then you might encounter an SSL error showing a "handshake failure alert" error code on your device’s screen. This error may appear due to many reasons, though there’s always some steps you can take yourself to solve them.

An SSL handshake is the process by which a client and server establish a secure communication channel for the purpose of exchanging data; in other words, an HTTPS connection. This exchange involves the server verifying the identity of the client, validating the certificate and providing some other security features.

This error message of a handshake failure may happen both for the client and the server. If you're experiencing it as a client, you can check if your system's date and time are correctly set, as this error may happen if the system clock is incorrect. Aside from that, it could be that the browser configuration is malfunctioning. In this case, you can always reset the browser and start over.

If you're experiencing the error as the server owner, it may also be caused by a problem with your system's certificate. There are many SSL checkers on the internet out there that are free to use, and it will be able to tell if your SSL certificate is outdated. If it is, simply update it.

In other cases, it might also have something to do with a mismatch in your cipher suite. In this case, you should check if the server supports the cipher suite that you're using, and that they match. This can be done by using an SSL tester software.

If all else fails, you can always ask for help from the people who developed Firefox and get your issues resolved. Try to contact their support or support forums to ask for help.