I can't browse on any page: they all result not safe. Why?!?!
I have an Mac OS Sierra 10.12.6. Last week I updated Firefox and suddenly can't browse on any page: they all result not safe. Why?!?! My version is in Italian: "Questa connessione non è sicura". Unfortunately it's not just the case of a single website but any website I try (firefox homepage itself).
Soluzione scelta
Questa connessione non è sicura This connection is not secure
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
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Soluzione scelta
Questa connessione non è sicura This connection is not secure
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