Smart HTTPS is a Firefox extension designed to ensure secure browsing by automatically switching HTTP requests to HTTPS when supported by the website's server. This tool enhances your online security by encrypting communications, preventing potential eavesdropping by third parties. In case of loading errors when attempting to access a site via HTTPS, the extension seamlessly reverts to the original HTTP protocol, ensuring continuous access to web content.

Key features include the ability to remember websites that do not support HTTPS, streamlining the process of protocol checks. Users can easily manage their preferences through the Options page, where they can view and delete unsupported sites. Additionally, a convenient toolbar button provides an easy way to toggle the extension on or off, with visual indicators showing its status. Users can also whitelist specific websites for added convenience.