The Site Information panel opens when you click the padlock in the address bar. This is where you can view information about connection security and site identity and make choices about any site permissions you have allowed or blocked.

Connection security

When you visit a website, a padlock icon in the address bar will generally indicate that the connection to the site is fully secure. For more information about the connection's security, click the padlock to open the Site Information panel. The top section of the panel shows you whether the current connection is classified as secure.

To learn more about the issuer of a certificate for a secure connection and the website's owner, or to disable the blocking of insecure content on a site, click the right arrow in the panel.

See How do I tell if my connection to a website is secure? to learn more about connection security. The Mixed content blocking in Firefox article tells you about Firefox's content blocking security feature.

Permissions

The Permissions section of the Site Information panel will display any special permissions you've granted to the website in the past and lets you adjust them on the spot.

To edit any other permission for a site, click the right arrow in the panel and then click the More Information button. This will open the Page Info window, which contains a comprehensive permissions section.