This is probably my usual naivete about how these things work, but why can’t Mozilla just ask for donations in the way that Wikipedia does (I think I brought this up in another comment a while back and someone explained that Mozilla is not allowed to take donations the way they’re currently set up, but maybe they could change this?)? Also now that K9 Mail has become Thunderbird mail, why don’t they set up a thunderbird.net email domain and charge for it like Tuta or Proton Mail does in exchange for not being spied on?