Proton Mail Desktop App Portable

Running security-focused software from a USB drive introduces unique risks. If you’re going the portable route, keep these tips in mind:

Future development will focus on:

Your login session, encrypted cache, and offline emails are stored inside the Firefox Portable folder on the USB, not on the host PC. When you close the browser and eject the USB, nothing remains on the computer. proton mail desktop app portable

Currently, Proton provides official installers for Windows (.exe), macOS (.dmg), and Linux (.deb/.rpm). While they haven't released a "PAF" (PortableApps.com format) version yet, the community has found ways to make it work. Currently, Proton provides official installers for Windows (

A: Yes, on Proton's User Voice forum. It has low priority compared to features like calendar sharing and Drive sync. Vote for it if you want to nudge the developers. It has low priority compared to features like

A portable executable contradicts their security hardening. Proton wants session data tied to your trusted device , not a USB stick that can be cloned or stolen.