This has been one of the best extensions in ALL browers, I usually jump from one to another because diferent devices and operative systems, thus always being annoyed by the bookmarks and kind of a slave of one of them, relying on so many external apps or txt until I found Floccus and it was an absolute change, now it doesn't matter what Browser or OS I am using, the Extension is available in all of them, I just import the json config and I can instantly have all my bookmarks updated constantly.
A good tip for people getting dome duplicates, use the extension to remove dups at first and disable the built-in browser sync for Bookmarks, that way only Floccus will be in charge of the sync for them while the Browser itself handle the forms, passwords, etc, and you prevent duplicates.