When using Proton Mail on a laptop, it’s often convenient to keep the session open to avoid re-entering the password and 2FA code every time. However, this can become a security concern, especially on shared or work computers.

I propose introducing a “Lock Session” feature, a temporary lock that can be unlocked using a quick PIN (similar to Proton VPN). This would allow users to secure their active session without having to go through the full login process again.