Super, ce module, il fait exactement ce que j'attendais. Plusieurs choix sont possibles pour marquer automatiquement les doublons (Dups) ou alors à la main.

Unpretentious and practical. When it finds duplicates it asks which to select (newest or oldest entry).

Amazing extension!
Due to constant import/export from/to other browsers I had a total of 15k bookmarks.
This extension removed the dupes with a single click to 3k bookmarks within minutes.
Highly recommended.

Seems like there is a bug regarding capital vs non-capitalized folder names. After running the "Moved marked bookmarks to 'Dupes'" command, any of my folders with a non-capitalized name were left without any bookmarks in them. The non-capitalized folders were empty.



EDIT: User error, the plugin is working as intended!

Super! (and amazing that Firefox doesn't have this essential functionality buit-in!)

The best in its kind.