Support for FIDO2/WebAuthn (Passkeys/Passwordless)
With the rise in account takeover, password breaches, and the complexity of managing hundreds if not thousands of account credentials and their MFA, a better solution is needed that simplifies and offer bullet-proof protection against phishing and account takeover attacks.
Many services like 1Password, Yubico/Yubikey, and Apple offer the ability to generate and securely store passkeys that can then be used to authenticate to services that support WebAuthn/FIDO2. I strongly recommend that ProtonMail, ProtonVPN, ProtonDrive, ProtonCalendar, etc. to support passwordless/passkeys in the near future to stay on top of security and ensure that its customers are properly protecting their accounts.
End-to-End Encryption is rendered useless if an attacker or governments can successfully takeover accounts due to weak or breached credentials. I believe the use of passkeys/passwordless supports and enhanced the mission and goals of Proton.me which is centered around security and privacy.

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Marek Reg commented
Yes, Yes, Yes.
I think this is an essential feature!!!
Security such as Yubico key strengthens the security features.
Enter it as soon as possible. Please!!! -
Stevie commented
Yes, I want this as well, but I would still use a password alongside a 2FA device.
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Mattias commented
This is a very important feature indeed. Passkeys must as soon as possible be adopted all across the industry.
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abl commented
Yes, please consider implementing Passkeys for logging into ALL of the Proton products. I have already started using Passkeys on sites that have started making it available. The experience is way more streamlined and easy for logging in and much more secure.