Firekeeper is an intrusion detection and prevention system for Firefox. It is able to detect, block and warn the user about malicious sites. Firekeeper uses flexible rules similar to Snort ones to describe browser-based attack attempts. Rules can also be used to effectively filter different kinds of unwanted content.
wwwhisper is a privacy-friendly system which simplifies sharing Web resources which are not intended for everyone. It allows you to specify which HTTP resources can be accessed by owners of which email addresses. Mozilla Persona is used to prove that a visitor owns an allowed email address. No site-specific password is needed. The Persona UI makes the authentication process really smooth. wwwhisper is application-independent and can be used for any Web resources.