Currently, Proton Pass allows storing credentials, notes, and files, but does not provide a way to store and use digital certificates for authentication or signing.

I propose adding a feature that enables users to securely store their digital certificates in Proton Pass and use them directly without installing them on the operating system or browser.

This would be extremely useful when working on shared or untrusted devices, where installing certificates locally is not safe or practical. It would also improve security and portability for users who rely on certificates for identity verification or encrypted communications.