#1 neither gives you an option to save AT LEAST ONE of the duplicates it finds, NOR warning that it will delete them all, no toggle, no nothing, it just does it,

#2 slow to delete once it has given you the delete-confirmation dialogue,

#3 also struggles when browser has duplicates from past carry-over from previous browsers and one has not been constantly reducing them each time - i had over 1500 bookmarks, and by the end of it, it had deleted almost all of them, ONLY LEAVING the ones not conflicting, which were a very small list of brand new ones i'd done after reinstalling windows but BEFORE importing my previous bookmarks,.. and on top of that,

#4 it could only handle 50 or so at a time, which i had to select by using TinyTask, because there was no rapid way of selecting them, NOR select-all, nor any other filtration or sorting functions, to select groups, etc. Literally single-click by single-click,.. no thank you,.. thank you TinyTask...

#5 but even then, at the end of it all, i had to RE-import all 1500+ ... because it had neither warned nor given any options for leaving at LEAST ONE, of the ones it found. About the only reliable function it had, was finding ALL that matched. Worse than expected.