RNPSign is a Firefox extension designed for managing digital certificates used in electronic signatures compliant with the ICP-Brasil standard. This tool simplifies the process of signing documents digitally by allowing users to list and add their digital certificates, whether from files or tokens, and manage a secure list of authorized websites. Additionally, RNPSign integrates seamlessly with native software, ensuring that users can easily install necessary components when required.

The extension enhances the user experience by facilitating the signing of documents on certified sites without storing personal data or passwords. Only user-added certificates are retained, which can be removed at any time. By adhering to the ICP-Brasil standards for public key infrastructure, RNPSign provides a secure and efficient solution for digital signature management.