Ann Dunham replied:

I guess the first thing is the big stuff, which is to download the GHacks
user.js privacy file which is described here.
http://www.ghacks.net/2016/07/03/com...refox-user-js/

To help others who follow this hint, the first thing I had to change in the
user.js file was that the Firefox Address Bar search was turned off.

The logic was that you can accidentally type a url in the address bar which
would become a search term instead. I'm not worried about that, and I don't
use the search bar (since it's no different than the URL bar in practice)
so I had to turn that option off.

The first thing I had to do in order to turn that option off was to find it
in my editor, so I had to set WinXP to always open "user.js" in my favorite
text editor.

Then I searched about and found the option he
user_pref("keyword.enabled", false);

So, to find it again, I put the acronym for work-in-progress in comments
and changed the setting:
//WIP user_pref("keyword.enabled", false);
user_pref("keyword.enabled", true)