It took a bit of troubleshooting to isolate the cause of this. But apparently after my most recent Firefox update, when I click on the "Email Link" function, which I have in my overflow menu, the email itself does not pop up on top of the browser, instead it is hidden beneath it when it used to be on top. I have done a couple of restores, tested all recent Windows updates, and upon a final restore and more or less disabling the Firefox updates, I believe the problem is with my most recent Firefox update. As long as I don't update, the email appears on top of the browser. Short of disabling Firefox updates entirely, of which I wish i could do, I would accept responsibility for that, I can find no other workaround except to minimize the browser in order to address & send the email. Thank you.