Thanks to your feedback, I've added a new option to display "dateAdded" for bookmarks and two new options how the recentness of dateAdded affects the score. By default this is very low. (It will take a while until this is published at the stores).

See https://github.com/Fannon/search-bookmarks-history-and-tabs#... (first example, and for more details the options.js).

Regarding the sorting / filtering: I see the value in it, but this would be more work and I want to think it through first. Maybe I'll find the time to add it. If yes, maybe I'll add a "sort" mode that cycles between "score" (default)" "last visited" or "date added". Although only score is available for all types of results.