Imagine how much open source software could be developed for $500 million/year. What the fuck has firefox done?

proton owns a service called SimpleLogin, you can use it to setup and manage email aliases. What is mailbox?

Use a custom domain with proton simple login. I set a wildcard regex and just allow <nameofservice>@customdomain.com. I can make up an email on the spot and when they inevitably add me to some annoying mailing list, I can just disable it in simple login.