Found another problem. When I said everything was working fine above, I had not tried to actually download a book. That fails (in Firefox). I get an error message like this example:
Code:
Firefox can’t find the file at https://my.domain.com/calibre/get/AZW3/107/Calibre
So things aren't quite right yet. This error does NOT happen if I use Chromium as my web browser. I can download find from Chromium. Hmmm...
p.s. - I am cutting-n-pasting the specific book page URL between browsers, both browsers running on the same computer. From that book detail page, I'm clicking the "Download" button. Totally different results between Chromium and Firefox for this identical operation.