[Solved] How to Fix Firefox Opera “Secure Connection Failed” with Error Code “sec_error_ocsp_future_response”

Mozilla Firefox or Opera shows Problem Loading Page because “Secure Connection Failed” with error code “sec_error_ocsp_future_response” when users try to open the webpage that contains CSS elements especially those secured sites with HTTPS. The detail error message as below:

Secure Connection Failed
An error occurred during a connection to. The OCSP response is not yet valid (contains a date in the future). Error code: SEC_ERROR_OCSP_FUTURE_RESPONSE The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem.

Follow below solution methods to fix this error message.

[Solved] How to Fix Firefox “Secure Connection Failed” with Error Code “sec_error_ocsp_future_response”

Content Summary

Solution 1: Update Firefox to the latest available version
Solution 2: Correct the Date and Time in Windows
Solution 3: Replace the CMOS battery
Solution 4: Disable OCSP verifications for certificate validity

Solution 1: Update Firefox to the latest available version

Step 1: Open Firefox and click on the action button located in the top-right corner of the screen.

Step 2: Click on the Help tab > About Firefox.

Step 3: If a new update is available, click on Restart to update Firefox to start the updating process.

Step 4: Firefox should automatically restart after the update.

Solution 2: Correct the Date, Time and Time Zone in Windows

Step 1: Press Windows key + R to open a Run dialog box.

Step 2: Type timedate.cpl and press Enter to open Date and Time window.

Step 3: Click on Change date and time.

Step 4: Use the calendar under Date and Time to select the appropriate values according to the timezone that you live in.

Step 5: Restart your PC.

Reference: Firefox Support > How to troubleshoot time related errors on secure websites

Solution 3: Replace the CMOS battery

Step 1: Turn off your PC and unplug the power source.

Step 2: Remove the side cover to expose the motherboard.

Step 3: Identify the CMOS battery, then use your fingernail or a non-conductive screwdriver to remove it from the slot.

Step 4: Clean the CMOS battery with a soft cloth dipped in isopropyl alcohol. Or replace the CMOS battery with the new one.

Step 5: Put back the cover, plug in the power source and start your computer back up.

Solution 4: Disable OCSP verifications for certificate validity

Step 1: Open Firefox and click on the action button located in the top-right corner of the screen.

Step 2: Click on Options to open the Preferences menu.

Step 3: Click on Privacy & Security from the left-hand section, then scroll down to Certificates menu.

Step 4: Uncheck the box associated with Query OCSP responder servers to confirm the current validity of certificates.

Alternatively, enter about:config in the address bar, search for ocsp and then set related parameters as below:

• security.OCSP.enabled;0
• security.OCSP.require;false
• security.ssl.enable_ocsp_stapling;false

Step 5: Restart the Firefox browser.