Proton Mail Desktop App Portable Today

Proton Mail’s security model actively works against this:

Result: No cookies, no cache, no history. It is a "stateless portable session." The only downside is you must re-enter 2FA every time. (But a hardware security key like YubiKey makes this fast). proton mail desktop app portable

When you use a portable app on a work or public computer, it doesn't leave traces in the Windows Registry or system folders. Proton Mail’s security model actively works against this:

The desire for a portable desktop app reflects a real need: users want to control their data without being tied to a single machine. Until Proton delivers a dedicated solution, the web browser—tamed into portability—remains your most reliable, secure, and practical ally. and practical ally.