The best security you can get in a web browser!
Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.
A simple add-on to provide a modal dialog when the user clicks on a password input field that will transmit insecurely over a non-HTTPS connection. Designed to offer some protection against Man-In-The-Middle attacks like SSL Strip.
Your browser trusts many certification authorities and intermediate sub-authorities quietly, every time you enter an HTTPS web site. This add-on reveals when certificates are updated, so you can ensure it was a legitimate change.
Force-TLS helps you manage sites that must be loaded over HTTPS only. Strict-Transport-Security is built into Firefox, but without a UI; this lets you import/export and manage these settings.
Displays the current SSL/TLS cipher, protocol and certificate chain in the Add-on bar and Site ID dialog
Connect securely to https websites by checking certificates with network notaries. See http://www.perspectives-project.org
Certificate viewer enhancements: PEM format view, file export, trust configuration
For IT admins who want very much to click through thousands of self-signed certificate warnings and get MitM attacked, this simplifies the process.
Development was discontinued, for details please read "About"
Informs you when digital certificates for secure websites are used.
Want an alternative to the centralized certificate authority scheme? This add-on gives you the capability to validate HTTPS-enabled websites via the OpenPGP Web of Trust instead of depending on X.509 certificate authorities!
A extension to notify users when downloading any content from SSL sites issued by harmful authorities.