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How to Fix SSL Error “Your Connection is Not Secure” on Mozilla Firefox?

Are you getting SSL Error “Your Connection is Not Secure” on Mozilla Firefox? Looking for an easy solution to fix this error message? If yes, go through with this post completely and carry out the provided instruction as in the exact order.

Know About SSL Error “Your Connection is Not Secure” on Mozilla Firefox

SSL Error “Your Connection is Not Secure” on Mozilla Firefox is one of the most common error messages that faced by almost all Firefox user that blocks them from accessing their preferable site and generate pop-up unexpectedly. This error message may also found on SEC_ERROR_UNKNOWN_ISSUER. It may occurs of several site at any time and hamper your surfing experience.

Reasons Responsible Behind Occurrences of SSL Error “Your Connection is Not Secure” on Mozilla Firefox

  • False name of SSL certificate
  • Incorrect settings of Date & Time
  • Domain includes several malicious content
  • Unauthorized SSL certificate provider
  • Outdated or damaged browser etc.

Solution To Fix SSL Error “Your Connection is Not Secure” on Mozilla Firefox

Solution 1 : Set Date & Time

  • Go to Start button and then after click on the gear icon to choose Settings option.
  • From the appearing list, choose option of Time and Language.
  • Set the option of ‘Set time automatically’ is on.
  • Lastly restart your PC.

Solution 2 : Delete The Browsing History on Firefox

  • First of all, start your Firefox browser. After that click on 3-horizontal lines at top-right corner of screen to open the Menu.
  • Choose History and then opt Clear browsing data.
  • On next, choose All and then click on Clear button.
  • Open the Setting option then locate section of ‘Change Proxy’.
  • On next, open the tab of Security & Privacy and then choose Medium level.
  • Lastly, close your Firefox browser and re-open it.

Solution 3 : Import & Export The Site’s SSL Certificate

  • Open your browser. Click on padlock icon which is placed on very left side of URL address.
  • On next window, click on Export feature button and memorize location in which SSL certificate was saved.
  • By clicking on it, import the SSL certificate and them choose “Options”.
  • Go to Advanced > View certificate > Import.
  • Lastly, re-open your Mozilla Firefox browser.

Solution 4 : Exclude The SSL Protocol Scanning In Antivirus Setting

  • Launch your anti-malware tool and then open the Set up window.
  • On Set up window, navigate to Advanced settings > Protocol filtering > SSL > Do not scan SSL protocol.

Solution 5 : Disable The Option of ‘Warn About Certificate Address Mismatch’

  • Just right-click on Windows key option and then launch Control Panel.
  • Choose Internet Options and then after go to Advanced tab.
  • On next, locate the option of Security and then open it.
  • Locate ‘Warn about certificate address mismatch’ option and then uncheck it.
  • Click on Apply and then OK button to save modifications.
  • Lastly, restart your Windows machine.



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