How to view Website certificate chain with Mozilla Firefox 125? I want to know which root certificate authority issued the Website certificate.

In most cases, root certificate authorities do not issue Website certificates directly. They usually issue certificates to intermediate authorities, who when issue certificates to Websites.

This sequence of issuing (or signing) certificates from a root certificate authority to a Website is called certificate chain.

In Mozilla Firefox 125, the certificate chain information is displayed on the "Details" tab of the Certificate Viewer.

1. Run Mozilla Firefox 125 and visit https://www.yahoo.com/. You see Yahoo Website displayed with a lock icon displayed next to the Website address.

2. Click the lock icon on the left of the Website address. You see the site information dialog box displayed:

Site information for ca.yahoo.com 
Connection secure 
Clear cookies and site data...

3. Click the "Connection secure" link. You see security properties displayed:

Connection Security for ca.yahoo.com 
You are securely connected to this site. 
Verified by: DigiCert Inc.

More information

4. Click the "More information" link. You see the Page Info window displayed with the "Security" tab opened.

Website Identity 

Website: ca.yahoo.com 
Owner: This website does not supply ownership information 
Verified by: DigiCert Inc 

View Certificate 

5. Click the "View Certificate" button. You see the Website certificate displayed with 3 certificates of the certificate chain in 3 tabs:

• *.fantasysports.yahoo.com - the Website certificate
• DigiCert SHA2 High Assurance Server CA - the intermediate CA certificate
• DigiCert High Assurance EV Root CA - the root CA certificate

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