Firefox 35 Displaying Certificate Error Page

PKI Tutorials - Herong's Tutorial Examples - Version 2.04, by Dr. Herong Yang

PKI Tutorials - Herong's Tutorial Examples

∟Firefox 35 Displaying Certificate Error Page

This section provides a tutorial example showing that Firefox 35 fails to validate an HTTPS server certificate and displays a certificate error page.

Now I want to see how Firefox 35 behaves after I deleted the root certificate "VeriSign Class 3 Public Primary Certification Authority - G5".

1. Open Firefox 35 to visit "https://login.yahoo.com".

2. Firefox 35 returns with an untrusted connection error page:

Certificate Error Page - Firefox 35 — Showing Certificate Validation Error in Firefox 35

3. Read the error message:

This Connection is Untrusted

You have asked Firefox to connect securely to login.yahoo.com, but we
can't confirm that your connection is secure.

Normally, when you try to connect securely, sites will present trusted
identification to prove that you are going to the right place.
However, this site's identity can't be verified.

What Should I Do? 

If you usually connect to this site without problems, this error could
mean that someone is trying to impersonate the site, and you shouldn't
continue.

Get me out of here!

Technical Details

I Understand the Risks

Firefox 35 fails to validate "login.yahoo.com" certificate as expected, because the root CA "VeriSign Class 3 Public Primary Certification Authority - G5" certificate has been deleted from Firefox.

Last update: 2015.

Table of Contents

About This Book

Introduction of PKI (Public Key Infrastructure)

Introduction of HTTPS (Hypertext Transfer Protocol Secure)

Using HTTPS with IE (Internet Explorer) 10

Using HTTPS with Chrome 40

►Using HTTPS with Firefox 35

Visiting "https" Web Site with Firefox 35

Viewing Server Certificate in Firefox 35

Server Certificate General Information

Viewing Server Certificate Path in Firefox 35