How do I move Mac notifications to lower right corner?

This unanswered thread pretty much says it all:

https://discussions.apple.com/thread/5656468?tstart=0

Notifications from my programs continually hide my tabs in Firefox and it’s annoying that you don’t seem to be able to easily switch out where they appear.

Their help text is in Settings > Notifications is, I think, laughable…

It tells me that it appears in the upper-right of my screen “without interrupting what I’m doing.” Uhuh.