2 devices both using same Firefox update 1 can access websites and the other can't with correct time setting
I repeatedly receive" Your connection is not secure" with the Advanced detail" SEC_ERROR_UNKNOWN_ISSUER" on my desktop Firefox but my laptop still can access the problem sites on Firefox. Both are using WIN 10 and can access the websites using Google Chrome or IE11. Any suggestions? Many Thanks Stephen
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There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.
https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can
https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites
https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message
https://support.mozilla.org/en-US/kb/connection-untrusted-error-message
Websites don't load - troubleshoot and fix error messages
http://kb.mozillazine.org/Error_loading_websites
- uses an invalid security certificate SSL_ERROR_BAD_CERT_DOMAIN
- configured their website improperly
How to troubleshoot the error code "SEC_ERROR_UNKNOWN_ISSUER" on secure websites https://support.mozilla.org/en-US/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER
both devices are using Bitdefender.
Make sure they are the same version and up to date.
Both versions are up to date and the same.