How To Fix Sec_Error_Revoked_Certificate In Mozilla Firefox

What is sec_error_revoked_certificate?

After receiving numerous queries from Mozilla Firefox users about the sec_error_revoked_certificate issue our experts teamed up to find the best way to fix it. As Mozilla Firefox is one of the more popular web browsers with millions of global users it is high time you learn what you need to know about the dreaded sec_error_revoked_certificate, what causes the sec_error_revoked_certificate and the ways to fix sec_error_revoked_certificate in Mozilla Firefox.


The sec_error_revoked_certificate in Mozilla Firefox is, unfortunately, a persistent problem. This can become a significant problem if you face the error while working online. This error is reported when trying to access specific websites online. At times, trying to access the website may display the error in different browsers too, such as Google Chrome or Safari. On the other hand, the website may easily open in another web browser but when trying to access it using Mozilla Firefox you may encounter the sec_error_revoked_certificate message on your browser screen.

What’s the cause of sec_error_revoked_certificate?

The root cause of the sec_error_revoked_certificate message lies in the political, economic and legal turmoil that certain companies are involved in today. It all started when the popular CA brand, WoSign bought the StartCom certificate authority firm. However, as WoSign did not disclose the deal publicly Firefox has refused to acknowledge its certification authority for recent websites. Hence, Mozilla Firefox tends to blocks the websites that have certification from WoSign issued within the past couple of years.

The sec_error_revoked_certificate issue is seen in the Mozilla Firefox v50 and over. It was integrated with the Mozilla Firefox v51.0.1 updates release.

Users are hoping to have this issue resolved with the next update for Mozilla Firefox. However, as this is not certain in any way, you need to know how to bypass this block and fix sec_error_revoked_certificate efficiently.

How to Fix sec_error_revoked_certificate in Mozilla Firefox?

Thanks to the intense research by our experts we were able to gather a list of 5 fixes for the sec_error_revoked_certificate message.

Check out the top 5 ways to fix sec_error_revoked_certificate on Mozilla Firefox:

Change Date and Time

This is one of the simplest solutions that can get rid of the sec_error_revoked_certificate message on your browser and allow you access to the website. Check your Mozilla Firefox browser settings to ensure that the date and time are precisely according to your geographical location.

Updating the date and time on your browser can often help to easily fix the sec_error_revoked_certificate message on Mozilla Firefox.

If in case you are seeing the error message for reasons other than inaccurate date and time on your browser, then try the next solution to fix the sec_error_revoked_certificate message.

Change Anti-Virus Settings

You may have set your preferences to make higher system checks to prevent seeing unwanted pop-up and browser ads in the anti-virus settings section. This could also be the cause that certain websites’ certificates are not acknowledged and marked as potentially harmful websites.

To disable great system checks you can follow these simple steps:

  1. Open anti-virus panel.
  2. Click on the ‘Settings’ option.
  3. Choose the ‘Additional’ settings option.
  4. Click on ‘Network’
  5. De-select the option to block unwanted pop-ups

In case you are seeing the error due to stricter anti-virus settings, then the above solution should be able to easily fix the sec_error_revoked_certificate in Mozilla Firefox.

In case of this solution does not work you can try the next one to fix sec_error_revoked_certificate successfully.

Reboot PC

Rebooting your computer is often one of the best solutions to fix numerous problems. It can also work to fix sec_error_revoked_certificate message too.

Follow these steps first before manually rebooting your computer to ensure that the sec_error_revoked_certificate error is fixed effectively:

  1. Click on the ‘Start’ menu at the bottom of the screen OR press the ‘Windows’ key on the keyboard
  2. Open ‘RUN’ from the options
  3. Type in – msconfig – in the space and press Enter
  4. As the ‘General’ panel opens, click on ‘Load Startup Items’ to de-select the option
  5. Ensure that no other option has been changed and are at default values
  6. Click on the ‘Services’ option on the top of the panel
  7. Click on the option titled ‘Hide all Microsoft services’
  8. Next, click on ‘Disable all’ option

Once you are done with the procedure above, you can choose to restart your PC manually. This is an excellent way to improve SSL security of your browser too.

However, in case this does not fix sec_error_revoked_certificate for you then you can try the fourth solution and get rid of sec_error_revoked_certificate message on your Mozilla Firefox browser.

Change browser settings

At times, the above solutions may not work to fix the sec_error_revoked_certificate message, mainly depending on the cause of the error. Hence, this is another solution to fix sec_error_revoked_certificate on your Firefox.

  1. Open Mozilla Firefox
  2. Click on the address bar and type in – about: config – and press Enter
  3. Next, type in – security.OCSP.enabled – in the Search bar of the browser
  4. Once the options window open, you need to change its value from ‘1’ to ‘0’, then press Enter
  5. Finally, reload the same website and it will load normally

If this solution is unable to fix sec_error_revoked_certificate then you can try the fifth solution too.

Change certificate settings

Another excellent solution to get rid of sec_error_revoked_certificate message on your Mozilla Firefox is to make a simple change in your browser’s settings. This is how to do it:

  1. Click on the ‘Settings’ option at the top-right corner of your browser OR you can click on the ‘Tools’ option from the Toolbar on the top of your browser window
  2. Once the new window opens, you need to click on the ‘Options’ button
  3. Next, click on the ‘Advanced’ tab
  4. Search for the ‘Certificates’ tab below the toolbar and click on it
  5. Once the dialogue box open, simply de-select the ‘Query OCSP responder servers to confirm the current validity of certificates’ option
  6. Finally, click on ‘OK’ to make the changes

Once you follow these steps, you can reload the website again and check to see that it open successfully as the sec_error_revoked_certificate error has been fixed.

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