Many thanks, Deozaan, for answering my questions. I'm glad to know that the expiring emails feature is optional. It's not one I'd choose. As for the possibility of Proton not supporting Pale Moon, they list the browsers they support, and PM is not among them. Though it's based on Firefox, PM has become increasingly independent. Some current features of Firefox do not work on PM (e.g., the way FF now handles web extensions). I'm not unhappy about this, since some of the extensions I prize most highly no longer work on FF but do on PM. But it does mean that PM may no longer be seen as just another version of Firefox. I guess I could try Proton out and see. However, the 500 MB storage limit also gives me pause. I've got about 2.5 GB on my main Gmail account (with a limit of 15 GB). So I think if I decide to give Proton a try, it would be as an additional secondary account, not a replacement for Gmail. In any event, I very much appreciate knowing about it.