No matter how simple & intuitive your browser is, bookmarks organization is a mess. For the first time building bookmarks we take lot of care, but later on we don’t show interest in organizing them. In Firefox we have very useful add-on called Bookmark Duplicate Cleaner. Once it is installed, you can launch it from Tools->Bookmark Duplicate Cleaner->Find duplicates. It will take some time to scan all duplicate bookmarks present on your browser. The user interfaces carries two columns. The left panel contains Title and right panel contains the duplicate bookmarks locations. To delete duplicate bookmark simply select it and click on delete button. It is a very useful tool for Firefox users to find and delete unwanted duplicate bookmarks from browser. Download Bookmark Duplicate Cleaner.