The last few days I have begun to get alerts that every page I go to is susceptible to the Heartbleed virus even though I have changed passwords, etc.

Question

Several weeks ago I added the Heartbleed Virus Monitor - o.2.1. I also changed a number of passwords.
Understood that main sites like Yahoo, bank, Outlook, gmail, etc. had already taken steps to guard against the virus. Several days ago, I began to get notices from the Monitor in the lower right corner of my desk saying that each page I went on was susceptible to the virus. Do I need to do something else to be safe. Is the add-on not working correctly?
Please help, if possible.

Answer 1

Who is the issuer of the certificates?
You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.
*Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
*Click the "View..." button and inspect the certificate and check who is the issuer of the certificate.
You can see more Details like intermediate certificates that are used in the Details pane.
If <b>"I Understand the Risks"</b> is missing then this page may be opened in an (i)frame and in that case try the right-click context menu and use "This Frame: Open Frame in New Tab".
*Note that some firewalls monitor (secure) connections and that programs like Sendori or FiddlerRoot can intercept connections and send their own certificate instead of the website's certificate.
*Note that it is not recommended to add a permanent exception in cases like this, so only use it to inspect the certificate.