Once upon a time, but not so long ago, when i typed, for example,
"+ Frisco" in the URL bar, the drop-down menu would open with exactly
those locations that I had bookmarked _and_ tagged with the "Frisco"
keyword.  Alas, this no longer works.  Instead, the list seems to be
populated by some sort of fuzzy scoring algorithm which includes _some_
bookmarks tagged with "Frisco" but also others whose URLs or titles just
match part of that string, such as "Annual Frisbee competition".

Since I rely on the tags as the primary organizational tool for my
bookmark library this is quite annoying.  The only thing that saved me
from posting a livid expletive-laden report is that the old behavior
seems to persist in the Bookmarks sidebar.  But I am not a fan of
sidebars, they're clunky to use and I am getting too old to remember
a dozen of new keybindings (one per sidebar).  So can I have the old tag
only + behavior back, please?

Notes:
1. The select widget "When using the location bar, suggest" is set to
"History and Bookmarks", and it always has been (back when this usage
worked).

2. The missing search configuration files reported by reportbug are
because I got rid of the search bar completely and I do all my external
searches explicitly with a keyword, for example "p iceweasel" to search
for a debian package, "d foobar" to search Duck Duck Go, and so on.