Discovered tonight that Mozilla finally set up a donation site at some point since I last checked - https://donate.mozilla.org/
Was impressed that they have bank accounts set up so I can do a SEPA standing order, aka a bank transfer within various European countries. Monthly S.O. setup, and a smaller one for Thunderbird =)
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!