SEC_ERROR_OCSP_INVALID_SIGNING_CERT has been reported by multiple Mozilla Firefox users when trying to visit one or more web pages. This error code is specific to Mozilla and is reported on multiple Windows versions (most commonly on Windows 7 and 10).


We looked into this issue by looking at user reports and their tactics to avoid the error notice. There are a few known conditions that cause this error message:

  • The website’s security certificate is invalid – Most of the time, the cause of the problem is outside your control and should be addressed by the website administrator.
  • The server’s date and time are out of date.

This article will help you resolve the SEC_ERROR_OCSP_INVALID_SIGNING_CERT problem. Other users in a similar circumstance have provided several solutions.

Please note that the steps provided below should be followed in order.


Method 1: Correcting the date & time

Many users reported that the problem notice was resolved, and they could access the website normally after updating the date and time settings.

If your date and time settings are much out of date, the webserver will refuse to connect for security reasons. Here’s how to check your date and time settings:

  1. To launch the Run dialogue, press Windows + R. In the Date & Time window, type “timedate.cpl” and hit Enter.
  2. Change the date and time in the Date & Time window.
  3. Use the calendar in the Date and Time box to set the settings for your time zone.
  4. Restart your computer and check the website again to see if the problem is resolved.

Otherwise, proceed to procedure 2 below if you’re still getting the SEC_ERROR_OCSP_INVALID_SIGNING_CERT error.

Method 2: Disabling OCSP Stapling

SEC_ERROR_OCSP_INVALID_SIGNING_CERT error is also caused when the OCSP security connection method fails for any reason.

Although not recommended, you can bypass the issue by telling Firefox to skip this security step. Remember to reverse engineer the steps below after utilizing the website.

What you must do:

  1. To access advanced Firefox options, open Firefox, type “about:config” and press Enter. Click the I accept the risk! Button.
  2. Enter the following preference name in the search box to find it:
  3. security.ssl.enable ocsp stapling
  4. Change the value of security.ssl.enable ocsp stapling to false.
  5. Restart your browser to check if that helps.

User Questions:

A secure connection has failed.

  • In your browser, type About:Config in the new tab box.
  • Then press Enter.
  • Put security in the search box section.
  • If the value field section is set to true, modify it to false.
  • Double-click it to do so.

How to fix OCSP errors

  • Change browsers. If you have difficulties opening online pages in Firefox, you should try Opera.
  • Updating FF FireFox.
  • Windows 10 time and date. Right-click the taskbar’s system tray clock.
  • Deactivate OCSP.


Secure connection failed in Chrome.

Solution #1: Correct the date and time.

Solution 2: Modify an antivirus’s settings.

Solution 3: Modify Internet settings in Google Chrome. Switch to https: Delete HTTP: (for images)

Safe connection failed in Firefox: fix?

Firefox can identify an expired or invalid security certificate due to inaccurate system date. Check your computer’s date, time, and zone. See How to resolve time-related problems on secure websites for more.

How do you test OCSP?

Change the radio button to OCSP and click Verify. Validate the certificate’s OCSP status. Validate certificate and certificate chain with ‘certutil -verify -prefetch. During this test, certutil will verify OCSP for certificate revocation.

Leave a Comment