On Thu, 04 Jan 2018 09:46:47 -0800, Gene Wirchenko
wrote:

On Wed, 3 Jan 2018 17:11:59 -0500, Wolf K
wrote:

On 2018-01-03 12:41, Gene Wirchenko wrote:
[...]
When I download in Firefox, I always specify the destination.
Otherwise, I do*NOT* know where it puts it.
[...]

Tools - Options - General - Downloads - Save Files To...

I have mine set to ask me, but there is a default, and I do not
know what it is in the sense that I would not know where to look if I
did not specify the directory.

You'd simply go look at the default. ;-)

I download to various locations depending on the item.

Same here, but I know what my default save location is and I sometimes
use it.