In the settings for the default mail app, Firefox for iOS- iPhone, would like to see ProtonMail included in the selection list. I use the ProtonMail app on my phone, as well as ProtonVPN. It is one of the top, highly secure, end to end encrypted, email providers available, and am phasing out my Gmail, Outlook and Apple Mail accounts. One reason is for the sake of privacy, the other is they have just become spam traps. Could find no way to submit this as a feature request. Could someone please help in doing that?