HTTPZ is a free security extension for Firefox that enhances user privacy by managing HTTP and HTTPS requests. It automatically redirects insecure HTTP requests to their secure HTTPS counterparts while maintaining a lightweight and unobtrusive presence. The extension also keeps track of sites that have been deemed insecure, temporarily blocking access for seven days to protect users from potential threats. Additionally, HTTPZ is compatible with other identity management extensions, ensuring a seamless browsing experience.

While HTTPZ offers robust features, it does have some limitations. For instance, it does not handle sub-requests from HTTP-only sites and may cause cosmetic issues when retrying requests during error pages. However, its built-in defenses against SSL-stripping attacks and configurability make it a slightly more secure alternative to other similar extensions. Overall, HTTPZ is a valuable tool for users seeking to enhance their online security and privacy.