Bookmark Detector 作者： Szilard Tester

A small and simple extension to avoid the creation of duplicate bookmarks. If a bookmark is created, it will check for others with the same* url created earlier. When at least one is found, it will remove the freshly created bookmark and show a notification about it. On/Off switch is provided (resets on browser restart).

*URLs differ only after the '#' symbol are assumed to be identical, therefore it removes a bookmark referring to a(nother) label on a page that have already been bookmarked.

The reason for creating this extension is that the good old 'Bookmark Duplicate Detector' has became unusable after the Quantum update.

Nothing is stored or sent. Your data is your data.
Source code is here: https://github.com/szilardtester/bookmark-detector-firefox
Found a bug? Please create an issue here: https://github.com/szilardtester/bookmark-detector-firefox/issues/new

Credits:
Material icons - https://material.io/resources/icons/?icon=bookmarks&style=twotone
A wonderful API - Mozilla Developers