WOW! I was skeptical at first, as many others are. I've been disappointed with a lot of extensions not doing what they claimed they would, but this one is LEGIT! I've kept copying my bookmarks to my new computers and browsers for YEARS. I accumulated far too many, and there were literally thousands of duplicates. Bookmark Dupes *quickly* and *easily* cleaned them up for me with just a few clicks!! Amazing extension and FANTASTIC work from the developer to solve a problem that needed a practical solution! Bravo!