This. It's actually one of the things that drove me away from ProtonMail and into the arms of FastMail (for emails that don't need quite that level of security,

This. It's actually one of the things that drove me away from ProtonMail and into the arms of FastMail (for emails that don't need quite that level of security, i.e. most). For a browser wrapper app though, they've done much better than any other I've seen. It's just slightly slow on notifications, to load, and isn't usable offline.