5 Ways to Solve the Error Code: SSL_ERROR_NO_CYPHER_OVERLAP

error code: ssl_error_no_cypher_overlap

When you open some websites in Mozilla Firefox, the network connection may be blocked. It will then show the error code: SSL_error_no_cypher_overlap. I will show you the various methods you can use to make the connection successful.

Have you ever seen the ssl_error_no_cypher_overlap code error on your browser when trying to access a website? The error occurs when Mozilla Firefox can’t obtain security data from a website when trying to access it – it may be old or hasn’t been updated over time.

SSL is the encryption used to make the website secure. Thus, when the error occurs, it means that the browser couldn’t communicate securely with the website. Moreover, the error occurs when certain common encryption types are disabled by the browser or server.

How to solve the Ssl_error_no_cypher_overlap error

Now that you have faced the issue, here are some valid ways you can use to solve the ssl_error_no_cypher_overlap error.

1. The old version of Mozilla Firefox

This error code can occur when you are using an old version of Firefox. To fix the problem, simply update your Firefox to the latest version.

Step 1: The first thing is to open the Mozilla Firefox browser. Then click on the 3 bars on the top right menubar. 3 bars. Scroll down and click on “Help”.

Step 2: On the next menu, select‘About Firefox’.

About Firefox

Step 3: A dialog box will appear showing whether your Mozilla Firefox browser is up to date. If not up to date, Mozilla Firefox will start downloading the latest browser version.

Mozilla Firefox browser is upto date

Step 4: Once the download is complete, click on ‘Restart to Update Firefox’. Once it restarts, you will get this notification.

Restart to Update Firefox

Step 5: Access the website on your Mozilla Firefox browser.

If that was the issue, the ssl_error_no_cypher_overlap error wouldn’t show again. If that doesn’t work, you can use these other methods.

2. Reset the SSL3 settings

Another method of solving the error is to reset the SSL3 settings on Mozilla Firefox. Some websites require these secure connection protocols to work.

Step 1: Open a new tab on your Mozilla Firefox browser.

Step 2: On the search bar, type in about:config and press Enter. The browser will redirect you to advanced Mozilla Firefox internet configuration.

about config

Step 3: When you see this prompt, click on “Accept the Risk and Continue”. This alert occurs to prevent you from making any accidental changes to your browser.

Step 4: On the next window page, search for SSL3.

search for SSL3

Step 5: Find these two specific values

security.ssl3.dhe_rsa_aes_128_sha                          false
security.ssl3.dhe_rsa_aes_256_sha                          false

specific values

Step 6: Change the values to false. To change, click the curved arrow on the far right. Setting the value to false is essential for security purposes.

Step 7: Also,verify the other SSL3 values. The recently changed values normally appear black and bold. Try to access the website to see whether it will open.

3. Bypassing Security Protocols and Browser configurations (TLS)

The (TLS) Transport layer security protocol provides privacy and data integrity between the browser and the server. To change the TLS settings, you can follow this procedure:

Step 1: Open a new tab on the Mozilla Firefox Browser.

Step 2: Inputabout:config in the Mozilla Firefox search box/address bar and press Enter

Step 3: You will get a notification to “Proceed with Caution”. Click on “Accept the Risk and Continue”. This caution prevents you from making any changes accidentally.

Proceed with Caution

Step 4: On the next page, search for “TLS”. The page will display a couple of results. Change these two results to 0.

tls.version.fallback – limit                  from 4 to 0

from 4 to 0

tls.version.min                                       from 3 to 0

from 3 to 0

Step 5: Try to access the website that was displaying the error.

Step 6: When you're done, change the values back to how they were By default,

security.tls.version.fallback – limit                                       from 0 to 4
security.tls.version.min                                                           from 0 to 3

4. Close to intercept

Firefox blocks some dangerous and fraudulent content by default. Hence, to change do this:

Step 1: Click the three-bar lines in the upper right corner of your menu bar and select “Settings”

select Settings

Step 2: Under Privacy & Security, scroll down to Security settings.

Privacy & Security

Step 3: Remove the restrictions by unchecking the boxes. “Block dangerous and deceptive content.

Block dangerous and deceptive content

Step 4: Try to access the website. If it doesn’t work, return the default settings.

5. Restoro repair

If all the other methods fail,  restoration is recommended. You can use Restoro repair to detect your computer, replace damaged Windows files, and fix error messages.

Step 1: Download and install the restore repair software.

restore repair software

Step 2: It will automatically analyze, check, and scan your computer device.


Step 3: After the scan is complete, click Start repair. This will help to resolve any underlying issues that might be there.

Start repair

Step 4: Once done, open your Mozilla Firefox browser and access the intended website.


These various ways will help to solve the Ssl_error_no_cypher_overlap error on your Mozilla Firefox browser. Even if you get to access the websites, be wary of any malicious viruses that can affect your laptop.

Use the solutions systematically till you get one that fixes the browser problem. There are some firefox-related issues that you should be wary of. Remember to have a stable internet connection when accessing the websites.

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