Firefox uses SSL to protect your private information by securing the connection. If you’re trying to connect to a website and encountering SSL errors, first make sure that that the website you are trying to reach is accepting HTTPS. If you are still receiving SSL errors then this post will show you how to fix the issue.

If you are someone who uses Mozilla Firefox browser and is facing SSL_ERROR_WEAK_SERVER_EPHEMERAL_DH_KEY error just like this error message “Firefox could not establish a secure connection to the server because they presented invalid credentials. The identity of the server could not be verified.  This could be a problem with the server’s security certificate, or the server may be trying to use weak ephemeral Diffie-Hellman cryptographic keys. ” then this post is for you. In this post I will provide you a simple and quick solution to fix firefox SSL_ERROR_WEAK_SERVER_EPHEMERAL_DH_KEY error and you can use Firefox browser without any problem

The error message ssl_error_weak_server_ephemeral_dh_key can occur for the following reasons:

  • The website you are trying to visit may be vulnerable to certain attacks.
  • Some websites secure their servers, and you will need secure server certificates to access these sites.
  • If you are using a Tomcat server, it is likely that you do not have a secure server certificate, which is causing the error message.

Basic tests

According to some users in the Firefox forums, the error message also appears because of an old driver in the browser, and updating this driver may help get rid of the problem. To update the driver

  • Go to the Open menu, then click on Tools. Remove all unnecessary extensions.
  • Update drivers if needed

Some Firefox users claim that a browser update fixes the problem. To update Firefox, do the following

  1. Select the Open menu and then click the Help menu.
  2. Now select Troubleshooting Information.
  3. Click the Refresh Firefox button.

Quick tip: Instead of fixing Firefox, you should install a faster, simpler and more reliable browser, such as. B. Opera. You’ll be amazed at the many customization options available to improve collaboration and productivity.


Don’t waste any more time fixing your broken Firefox browser. In just a few minutes, Opera is installed and configured so that you can enjoy a smooth browsing experience.

How do I fix ssl_error_weak_server_ephemeral_dh_key?

1. Configuring Firefox to ignore SSL errors

It’s not completely safe, but most forum users have reported that this technique works. To do this, two security codes must be set to false in the Mozilla Firefox browser.

  1. After you open the Mozilla Firefox browser, click the Firefox icon.
  2. In the search box, type about:config.
  3. The browser will display a warning that this may void the warranty. Ignore it and click on I’ll be careful, I promise!
  4. A new page will open and you need to enter security.ssl3.dhe_rsa_aes_128_sha.
  5. Check the Value tab, if it is True, change it to False.
  6. Then in the security.ssl3.dhe_rsa_aes_256_sha search field, type the following value.

2. Disable SSL 2.0 in Tomcat server

It is possible that the Tomcat server is enabled by default, especially if you are using SSL 2.0.

In that case, just disable SSL 2.0. Weak ciphers are enabled by default in Tomcat and should be disabled. Now open the file server.xml and enter the following code,

enablelookups=false disableuploadtimeout=true acceptCount=100 scheme=https secure=true clientAuth=false SSLEnabled=true sslEnabledProtocols=TLSv1,TLSv1.1,TLSv1.2 ciphers=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_RC4_128_SHA, TLS_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA,SSL_RSA_WITH_RC4_128_SHA keystoreFile=mydomain.keystorePass=password truststoreFile=mytruststore.truststore truststorePass=password/> ;

Assuming you have completed the above steps in a timely manner, Firefox should no longer display the volatile notification. In addition, your web pages should load faster than before.

Frequently Asked Questions

How do I fix certificate errors in Firefox?

Once you’ve set up your browser for the first time, you may run into one or more issues when using it. The most common problems are certificate errors, which may occur if your computer was missing certain security certificates during the installation process. These security certificates are used to allow your computer to connect to secure websites. Sometimes, certificate errors can be a sign of a more serious issue with your computer, but in most cases, they can be easily fixed. Since you are here reading this, it is likely that you are a Firefox user who have just encountered an error message proclaiming that there is a problem with your certificates. The message will have done its job of scaring you into thinking there is something seriously wrong with your computer, and you may even have begun to wonder if you will ever be able to see your favourite websites again. But do not panic—certificate problems are common, and they are usually easy to fix.

How do I fix Firefox unable to connect?

Many users find that their Firefox browser is unable to connect to the Internet or to certain websites in the browser. In some cases, this problem may be caused by a software conflict or a corrupted plugin file. In other cases, the problem may be caused by a problem with Firefox itself, or there may be other causes. The problem is that Firefox doesn’t recognize your connection. This is usually due to a problem with your Internet connection or a problem with your computer. To figure out which is causing the problem, follow these steps:

How do I repair Firefox installation?

Firefox is a free, open source browser that has garnered a lot of popularity since it’s inception in 2002. If you’ve recently upgraded to a new version of the browser and are having trouble, you might need to repair the installation. (note: the blog was not in English, I used google translate to get the gist of the rest of the article) The latest version of Firefox is now more stable than it was a year ago. But, if you have a problem with your Firefox installation, so you may want to try to repair it. With several ways to repair Firefox, you may ask, which way should I choose? You may take some time to get to know about the different ways to repair Firefox, including reinstalling Firefox, repairing it directly and repairing it with the help of another program like Spybot Identity Repair.

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