Reyter said

I used to use "Old Location Bar" add-on. That hasn't been available for sometime now but it was okay because Firefox added options for limiting the number of URLs that appeared in the drop down list in the URL bar. It was something like "Choose what appears in the location bar" (to which I chose URLs I have typed or pasted) and how many URLs (to which I chose 3). With this latest update I get 10 which fills literally half the screen but most importantly, I don't want URLs from any site for which I visited once and probably never will again.

So of course my question is, how do I get it back to the way it was?

HI, please Copy/Paste about:config to the Address Bar then Enter.

Copy/Paste browser.urlbar.maxRichResults into the Search Bar that in the top of the window screen width then Enter

Changer the 10 to what number you would like.

Go to the 3 Bar Menu and Exit Firefox and Restart and you should have what you want.

Please remember what you did above.

Please let us know if this solved your issue or if need further assistance.

You can set what suggestions show when you enter an URL in the location/address bar bar.

• Options/Preferences -> Privacy & Security
  Address Bar: When using the location bar, suggest:
  History
  Bookmarks
  Open tabs

• https://support.mozilla.org/en-US/kb/awesome-bar-search-firefox-bookmarks-history-tabs
• https://support.mozilla.org/en-US/kb/search-web-address-bar

phshadow's solution worked perfectly. Thanks a lot.