It is much easier to thumb through emails using Fastmail since most emails have an avatar. Proton only uses favicons which either don't show up or are low quality, even with popular domains like Google. Instead, Proton should use BIMI logos or Gravatar when they are available, then fall back to favicons when it's the only option. Since some people might have privacy concerns with Gravatar, that should be optional or it can be routed through Proton's servers similar to how they do with favicons.
The recent release triggers a Keychain access prompt every time the app launches. Loading an entire browser-based runtime feels unnecessarily heavy, especially on Macs with Limited Memory.
A native app built with Swift and AppKit could offer better memory efficiency, faster startup, and deeper integration with macOS features like Keychain. For a company focused on privacy, a lightweight, well-integrated native app would also inspire greater confidence in the overall user experience.
Please add a toggle for the email background in dark mode. The glaring white backgrounds in dark mode are unbearable—you practically need sunglasses! Just look at Thunderbird to see how well it works. And please, let's not have to wait months or years for this...
