Thank you, shs. I have not experienced that with Safari. For me, it does almost exactly the same thing as Chrome: attachments made on 11/6 and before open in a new Safari tab. Those attached after 11/6 download automatically, without giving me the Save dialog that Chrome does. I suspect the difference might be in my Safari settings. In Chrome there is a setting for "Ask where to save each file before downloading." I have that turned on, and I suspect there is something similar in Safari that I haven't bothered with since I rarely use Safari.