I am sorry, but I do not thing that there is an easy way to change this http://kb.mozillazine.org/Browser.places.createdDefaultQueries

Way back in 2012, I posted a recipe to create a new "smart" bookmarks folder that lists the 20 most recently added bookmarks: https://support.mozilla.org/questions/934205#answer-358492

Do you want to try that and see whether it works for you?

Thanks for the responses. I am unwilling to try the "recipe" cuz it's over my head. However I DO appreciate the assistance.

Well, there's always this way:

(1) Open the Library dialog to the bookmarks section using Ctrl+Shift+b

(2) In the search box at the upper right of the Library dialog, type http -- this will match pretty much all your bookmarks

(3) Click the Added column heading to sort by date you created the bookmark (if you do not have this column displayed, right-click Name, Location, or one of the other headings and add it from the drop-down list)

You can create a new bookmark and set the location to this place query:

place:folder=BOOKMARKS_MENU&folder=UNFILED_BOOKMARKS&folder=TOOLBAR&queryType=1&sort=12&excludeItemIfParentHasAnnotation=livemark%2FfeedURI&maxResults=20&excludeQueries=1

You can adjust the maxResults parameter to get the number of results. Close and restart Firefox to make the query work as a smart folder.

jscher Thank you this method is good for my tech level and gives me a way to accomplish the task AND eliminate the frustration that comes with "There's gotta be a way to do this" w/o having to be anything more than the avg person