Thunderbird desktop app has Tuta Calendar and Tuta Mail web-app integration via add-ons

As someone who uses Thunderbird, this is good news, but admittedly, for both Proton and Tuta, I prefer to use the official desktop app, because it allows me to send scheduled messages. On Thunderbird, scheduled messages require that the app remains open. Whereas with Tuta and Proton’s apps, because they’d connected to the web, I can close them, shut my computer off, go to bed, and rest assured that my scheduled emails will be sent in the morning.