If you're already using Proton, you can also download it from the Proton Mail web app: * Log in to your account at mail.proton.me. How to create a Proton Mail shortcut on your desktop
The most reliable way to use Proton Mail portably today isn't a dedicated "app" file, but rather a dedicated solely to Proton. Why this works: proton mail desktop app portable
Proton Mail has shown willingness to listen to user feedback. You can vote for or request a portable version on their official forum. Key arguments to mention: If you're already using Proton, you can also