Fantastic program. Had been manually trying to remove duplicates caused by Xmarks issues months ago. Installed Bookmark Dupes and not long after it had removed 11293 duplicates. Very easy to use. No problems encountered so far either.

Bravo, exactly what I needed. Removed 724 duplicate bookmarks and took a few mere minutes. Automatically pick oldest added duplicate worked for me.

After a Firefox account sync on a new machine, I was left with many duplicate bookmarks. This extension removed them, and then the empty folders they had been in, with just a few clicks. It took just a few moments. This was a great time saver.

Quickly handled 12,000 duplicate bookmarks caused by bugs in Xmarks

Highly recommended!

Probably the best extension to remove duplicates at present.

I had over 1322 duplicate bookmarks because of a syncornisation error and this simple addon did the job in less than a minute.
Simple design, easy to use and a top recommendation !

really helpful

Awesome and fast UI for selecting duplicates in one go, and just one click to delete... Really appreciate that only bookmark editing permissions were required! Suggested improvement: deletion process is slow with lots of disk usage (read/writes). Perhaps add option to process the deletion entirely in RAM?

Very simple, easy and straight to the point!