Added by on 2018-02-14

Fix your connection is not secure|Error code: MOZILLA_PKIX_ERROR_NOT_YET_VALID_ISSUER_CERTIFICATE-sec_error_unknown_issuer-I got the error message while surfing the internet: Your connection is not secure firefox error, this method is working on windows 7,windows 8,windows 8.1,windows 10 also-The owner of has configured their website improperly. To protect your information from being stolen, Nightly has not connected to this website-This site uses HTTP Strict Transport Security (HSTS) to specify that Nightly only connect to it securely. As a result, it is not possible to add an exception for this uses an invalid security certificate. The certificate does not come from a trusted source. The certificate will not be valid until Wednesday, April 20, 2016 6:41 PM. The current time is Tuesday, February 2, 2010 11:52 AM. Error code: MOZILLA_PKIX_ERROR_NOT_YET_VALID_ISSUER_CERTIFICATE.
Your connection is not secure this error is occurred in mozilla firefox,firefox.

Goto date and time settings then set your date and time in standard format.
finally the error is fixed automatically.
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