IndicateTLS is a Firefox add-on designed to bolster web security by providing insights into the transport layer security (TLS) protocols of the websites users visit. By leveraging the SecurityInfo-API, it presents an icon in the address bar that indicates the TLS protocol version in use, enabling users to quickly gauge the security status of their browsing session. A simple click on the icon reveals detailed information about the TLS versions used by the main site and any third-party servers involved in resource fetching.

This tool is particularly beneficial for developers and IT professionals who prioritize secure web interactions. With its subscription-based model, IndicateTLS serves as a dedicated solution for web development and security oversight, ensuring that users remain informed about the security measures in place during their online activities.