Well...here's something interesting:
I am continuing to use Edge as my default browser; however, I set up a shortcut to make my Gmail open in Chrome rather than in Edge (use this as the target for the email file in the shortcut: "
C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" "https://mail.google.com/mail/u/0/#inbox" in the shortcut ).
Soooo...I have been using that "special" shortcut for several days now and that exit message has stopped (keeping my fingers crossed...).
What seems to be an anomaly is that both Edge and Chrome use the same basic engine.
Well, as long as it keeps doing what I want it to do, a special shortcut (which takes only seconds to set up) is the way I will go.
Thanks for following this, Tom.
Ed