I have over 41k bookmarks and have been slowly cleaning up all my duplicates over the past few months. Just before the recent February update I recall having a total of over 27k duplicates. Now, it's showing that I have only 3.6k duplicates when selecting "All Bookmarks" in the sidebar menu. This isn't accurate. For example, if I type "design" in the search field and narrow it further by selecting "Duplicates", it shows that I have over 10k duplicates with that specific keyword. So again, it reports 3.6k duplicates under "All Bookmarks" yet it shows over 10k duplicates that contain the word "design".