Site Identity Button
Site Identity Button is a security feature of Firefox web-browser. This feature enables you to get more information about the site you visit. With the help of Site Identity Button you can find out if the site you are visiting is verified , the website you are viewing is encrypted or not, who owns the website and who verified it. This should help you in avoiding malicious website that try to get you to provide important information.
If you click on the Site Identity Button while browsing a website you will see one of the three colors - gray, blue, or green with "Passport Officer" icon and with relevant information about that particular site.
Below is brief explanation of all three color icons.
Grey - Website has no identity information
If the Site Identity Button is grey then it means that the site doesn't provide any identity information. The connection between the sever and Firefox is partially encrypted or either unencrypted and shouldn't be considered safe from/against possible eavesdroppers.
Blue - Website has basic identity information
If the Site Identity Button is blue then it means that the website's domain is verified and the connection is encrypted between the server and Firefox and therefore protected from/against eavesdroppers.When a domain is verified, it means that the people running the website have bought a certificate which proves that they own the domain. For example, the Orkut website has this type of certificate and has an encrypted connection, so it displays blue Site Identity Button. When you click the Site Identity Button, it tells you that the Orkut website is verified to be part of google.com as certified by Thawte Consulting (Pty) Ltd.
