Hello all, Since this morning I'm having a huge issue in FF: I can not connect connect to many websites such as google, facebook, amazon... SEC_ERROR_UNKNOWN_ISSUER It comes from a certificate issue emitted by DigiCert, It is the DigiCert Global Root G1A. Yet this certificate does not exist, in DigiCert database. And worse, on their dignostic tool, the websites use the DigiCert Global CA G2 I could not bypass the certificate acceptance because of HSTS protocol. I looked at the clock, no problem. I used chrome, it worked. I found a way to work around this problem: I went to about:config and put the security.enterprise_roots.enabled on TRUE. I could connect again to websites. BUT, not I have an additional issue: I can not log-in in amazon. I can be on the website, but when I try to log-in, nothing happen. No error message. Nothing. Just an infinite search time (the dots in the tab are moving back and forth). It send a request to fls-eu.amazon.com and it never arrives. I also tried on Chrome, perfect. So this is typically a FF problem. And I'm stuck... Do you have any fix? (I really do not want to switch to Chrome...)