I've been using Mozilla and DuckDuckGo privacy services for years, and subscribing when that is available. Mozilla and DDG are both doing a great job protecting our privacy and our inboxes. A fan of both, I have to say that Mozilla have nailed this one - it is so simple, so transparent and so well-integrated into online workflows. I've seen the complaints of others - domain denied, no amazon login, ... - and can report that at least today these are no longer issues. Great job, Mozilla!!