Just the right idea for what I wanted.
I go through job boards and can open lots of position descriptions in tabs. Then I can use this add-on's feature to kill off duplicate positions, etc.
Bummer: If I search for a term, it skips matches if the term is at the end of a sentence, apparently because of the period.
Bummer: It doesn't refresh the tabs list when one or more tabs are closed. If a lower number tab is closed, and a higher number tab is selected from the search result list, it directs the user to one tab higher than the tab selected in the search results list. That is, closing a tab creates an offset in the tab numbering that the tabs list doesn't compensate for.
If you're searching for a term as a basis for closing several tabs, best to search and then select tabs from the results list highest to lowest so that the offset created doesn't effect access to the remaining tabs in the results list.