Really nice addon. Works perfectly with the latest firefox. The only problem I think it has is that when searching the wrong bookmarks, sometimes it takes a while if there are a lot of mistakes of the bookmarks, and the screen doesn't show any results while it's working in progress. I think it would be better to display the list of found mistakes while it's still working. And adding a pause function would save those who don't want to wait. But anyway a good addon!