1524379 - With the newest update all I get from every site I try to navigate to is this: SEC_ERROR_UNKNOWN_ISSUER

Status: RESOLVED DUPLICATE of bug 1523701

(Core :: Security: PSM, defect)

Description

[Don Kelly]

Attachment: firefoxError.PNG

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36

Steps to reproduce:

1. I start firefox as usual
2. I click on one of my bookmarks and with every site all I get is this message: SEC_ERROR_UNKNOWN_ISSUER

Actual results:

This is the whole message:
Your connection is not secure

The owner of www.icloud.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.

Learn more…

Report errors like this to help Mozilla identify and block malicious sites

Expected results:

Until this new update FireFox worked perfectly and not I can no longer use it. I am on an AMD-64 bit machine and it has been working also

Comment 1

[Gingerbread Man]

This is usually caused by your security software having an "HTTPS scanning" feature enabled, but not having its certificate in Firefox's trust store. The support article recommends reinstalling the software. Bug 1523900, comment 4 reports this workaround was effective.

https://support.mozilla.org/kb/error-codes-secure-websites

The issue is being investigated in bug 1523701.