ProtonMail offers encrypted contacts for both web and mobile applications (https://protonmail.com/blog/encrypted-contacts-manager/). Calendar and note functionality will be released in the future.
Thank you for your suggestion. Password security is incredibly important and something we take very seriously at Proton Technologies. We will consider add a Password Manager to our product suite roadmap.
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Firefox already does a good job avoiding tracking, and you can easily add plugins like "Privacy Badger" or "DuckDuckGo" to improve it.