How to Fix Error ssl_error_weak_server_ephemeral_dh_key on Mozilla Firefox
If you’re facing this issue, then hold back, here we’ll give you a step-by-step guide on how to resolve this Mozilla Firefox error message: ssl_error_weak_server_ephemeral_dh_key. But, before we do that, let’s understand what exactly causes this error message.
What’s Firefox ssl_error_weak_server_ephemeral_dh_key Error Message?
Some Other Common Reasons Why This Error Occurs
Bug in Your Installed Mozilla Firefox
Change in Behaviour of Your Installed Firefox
Key Size Is Not Compatible
Ciphers Being Blocked
Apart from this, some other reasons due to which users can see this error message are:
- The website you’re visiting is vulnerable to specific online attacks.
- If the server is Tomcat and there’s no other secure server certificate.
- Some websites likely keep their servers secured, and to access it, the secured server certificate is required.
A Step-by-step Guide to Fix Error ssl_error_weak_server_ephemeral_dh_key on Mozilla Firefox
Sometimes it happens that this error is due to the old drivers into your browser. So, first, check and try to update with the latest ones, it may solve the issue. To update the driver,
- Press Ctrl+Shit+A or
- Click on Open Menu
- And, go to Add-ons
In your Mozilla Firefox menu, (Three Lines at Top Right Side), click “Help Menu.”
Substitution of Insecure Fallback Host
Go to your Mozilla Firefox browser and in the address bar type: “about:config”.
Proceed with Caution page will appear over there click on the checkbox “Warn me when I attempt to access these preferences” and then click “Accept the Risk and Continue” button, like below:
Now, restart your Firefox browser and verify whether the website is opening or still shows the same error message, if the error message is still persisting, then move to the next step.
Modifying SSL3 Preferences
Like the above step, again open the hidden config menu of the Mozilla Firefox browser.
1. Copy and paste: “security.ssl3.dhe_rsa_aes_128_sha” and change its preference from true to false.
Though some steps like opening a hidden config menu of the web browser may seem a bit new or techie to you, but no need to worry as trying these mentioned solutions won’t harm or change the settings of your browser.