KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation
Your browser trusts many certification authorities and sub-authorities quietly, every time you enter an HTTPS website. This add-on for advanced users reveals when certificates are updated, so you can ensure it was a legitimate change.
Securely bypasses Firefox HTTPS security errors by verifying certificates using a collection of Network Notaries. See http://www.cs.cmu.edu/~perspectives/
During my attempt to verify and understand who stands behind the sending of fraudulent “reminder†email messages tricking our customers, I created a certificate from the source I was following. And my certificate was issued without any further questions.
a spreadsheet with a list of 531 entries on the currently known bad DigiNotar related certificates.
This tool can help you fix the incomplete certificate chain issue, also reported as Extra download by Qualys SSL Server Test.