Error SEC_ERROR_OCSP_FUTURE_RESPONSE in Firefox has been fixed

  • SEC_ERROR_OCSP_FUTURE_RESPONSE error occurs when Firefox users try to access certain files that contain CSS elements.
  • It appears that the problem often occurs with secure (HTTPS) websites.
  • Mozilla has already fixed the problem with a patch that was released in version 51.
  • If you are using a version of Firefox older than version 47, the problem is most likely due to a bug in Mozilla Firefox that affects some CSS elements.
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If users try to open a webpage featuring CSS elements, particularly on secure websites with HTTPS, they receive an error message with error code “sec_error_ocsp_future_response”.

A SEC_ERROR_OCSP_FUTURE_RESPONSE error has been reported by some Firefox users when opening a web page. This error could be caused by security settings in Firefox or Opera.

It occurs when the device time and date settings are incorrect, which leads to SEC_ERROR_OCSP_FUTURE_RESPONSE errors. Firefox will display the error if the time and date settings are incorrect. The SEC_ERROR_OCSP_FUTURE_RESPONSE error in Firefox and Opera can be easily fixed with this article.

I am having trouble connecting securely

Can you tell me how to fix the SEC_ERROR_OCSP_FUTURE_RESPONSE error that I receive when using Firefox? I have a hard time connecting to some websites with this error code.

It was impossible for me to even contact you, so I had to switch to Internet Explorer in order to do so. Firefox was introduced to me because IE did not support some sites I go to since it was not new enough, despite the fact that it is the highest version of the browser that is compatible with my Windows Vista system. When Firefox first came out, I used it without any problems. . . now it does not seem to load most sites, including yours. Is there a way to resolve this error message issue? Thank you.

This connection failed because the OCSP response contains a future date and is not yet valid (SEC_ERROR_OCSP_FUTURE_RESPONSE). This page cannot be displayed due to an inability to verify the authenticity of the data received. If you encounter this problem, please let the site operators know.

OCSP’s response (that contains a future date) is not yet valid, according to the error message.


What is causing the SEC_ERROR_OCSP_FUTURE_RESPONSE error in Firefox?

What is causing the SEC_ERROR_OCSP_FUTURE_RESPONSE error in Firefox?

Firefox users typically encounter the SEC_ERROR_OCSP_FUTURE_RESPONSE error when they attempt to access CSS elements in encrypted files.

You can resolve this issue by updating your browser if you are using an older version of Mozilla Firefox which is affected by a bug.

A bug in Firefox has been found to cause this problem, which affects how some CSS elements are rendered. In fact, the problem is much more common with Firefox versions 47 and lower. A patch for the problem was already released in version 51 by Mozilla, fortunately.

You should replace your CMOS battery with a healthy one if your Firefox version is already the latest. Check if the date and time are already correct.

SEC_ERROR_OCSP_FUTURE_RESPONSE errors cannot be avoided by disabling OCSP checks, but you can access those sites that don’t have legitimate OCSP concerns.


To fix the SEC_ERROR_OCSP_FUTURE_RESPONSE error in Firefox

Updated: February 2024

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To fix the SEC_ERROR_OCSP_FUTURE_RESPONSE error in Firefox

Switch to another browser

Consider switching to another browser if you’re experiencing persistent trouble opening web pages in Firefox. The browser core has incredible functionality, so you shouldn’t have any problems.

A third-party browser add-on has a wide range of features that will surpass many of the most popular plug-ins, such as Chrome or Firefox. Third-party browser add-ons include pop-up video, built-in VPNs, and chat integration.

You will not have to worry about unnecessary advertisements or images on your web pages if you have an ad blocker built in. In addition to task development, battery charging, tab management, etc., the third-party browser comes with various built-in modules, all of which are easy to manage. This browser has a great design, is intuitive, and is very customizable.

Update Firefox

  1. Open Firefox.
  2. The menu will open when you click Open Firefox.
  3. For more options, click Help.
  4. You can find more information about Firefox by clicking on About Firefox.
  5. Firefox can be updated by clicking Reload.

Check the time and date in Windows 10

  1. From the taskbar’s right side, click on the clock.
  2. By pressing Windows + S, you can access the Start menu.
  3. The search box should be filled in with the keyword time.
  4. You will be taken to the Preferences window when you click Change date and time.
  5. The option to set time automatically should be enabled.
  6. If you are using a laptop or desktop, restart it.
  7. The time and date settings can be adjusted manually by clicking the Edit button.
  8. Restart Windows after clicking Edit.

Note: You may need to replace the CMOS battery in your computer if the date and time in Windows keep changing. This can be done by removing the old CMOS from the motherboard, but some users prefer to take their computers to a computer repair service to replace the CMOS battery.

To disable the OCSP check

  1. Start Firefox.
  2. The Preferences menu can be accessed by clicking the Preferences button.
  3. Select Privacy and Security from the tab’s left side.
  4. If you are unsure about the status of your certification, scroll down to Query OCSP Response Server.
  5. Check the box to query the OCSP response server.
  6. Restart Firefox if it is closed.

Mozilla Firefox’s SEC_ERROR_OCSP_FUTURE_RESPONSE error can be completely fixed by following these steps.


RECOMMENATION: Click here for help with Windows errors.

Frequently Asked Questions

  1. In the Tools menu, click the Options -> Advanced tab.
  2. Click the Encryption tab.
  3. Click the View Certificates button.
  4. Click the Servers tab.
  5. In the Certificate Name column, find the z/OSMF CertAuth section.
  6. Select the certificate files in the z/OSMF section and click Delete.
  7. Click OK.

  1. Your antivirus program might have blocked access to firefox.exe. Check your antivirus software's log and quarantine.
  2. You don't have permission to run the firefox.exe file. Change the permissions for the file.
  3. The firefox.exe file might be corrupted. Reinstall the application.

  1. Click the menu button and select Options.
  2. Under General, go to Proxy Network Settings.
  3. Click on Settings.
  4. The Connection Settings dialog box opens.
  5. Change the proxy server settings.
  6. Close the Connection Settings dialog box.
  7. Close the about: preferences page.

To solve this problem, you need to go to the settings of the security software you are using and find the SSL scanning feature in that software. Once you have found it, uncheck the box indicating if it is enabled. Once you have disabled this feature in your security software, you can try visiting the website again.

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Mark Ginter is a tech blogger with a passion for all things gadgets and gizmos. A self-proclaimed "geek", Mark has been blogging about technology for over 15 years. His blog,, covers a wide range of topics including new product releases, industry news, and tips and tricks for getting the most out of your devices. If you're looking for someone who can keep you up-to-date with all the latest tech news and developments, then be sure to follow him over at Microsoft.