I've got sooo many bookmarks I need much more than the default features to organize and manage them. This collection does not include add-ons related to social bookmarks
Monitors web pages for updates. Useful for websites that don't provide Atom or RSS feeds.
Brief makes reading RSS feeds as easy and intuitive as it gets. Designed to have exactly the right set of features, it is powerful and simple at the same time. Feeds are presented on a seamless, interactive page which let's you bookmark and tag items...
Add "Go Parent Folder" menu to context menu in The Library list view and Search result in Bookmarks Sidebar.
Places a "Manage Folder" item on the context menu of bookmark folders, which opens the "Places Organizer" expanded to that folder.
Adds feed reading, notifications, favicons, and other enhancements to Live Bookmarks.
OPML Support adds OPML import/export functionality to the Firefox Bookmarks manager.
Detects Duplicate Bookmarks when bookmarks are added and specify where is the previous URL. You can also search and delete duplicates URL already in your Bookmarks.
Firefox 13 support is available from http://bookmarkdd.mozdev.org in version 1.1.1.
WebReview enhances the abilities to re-find already visited websites and visualizes every single browsing session based on your local Firefox history. Furthermore it proposes you regularly visited sites just in the right time.
Tidy up your favorites with live thumbnails. Conveniently use the same set of favorites and the same convenient user interface in all of your browsers - IE, Firefox, Chrome and Opera!
Note: you need setup additional program except addon.
Bookmark Previews adds an album view and thumbnail view to the bookmarks manager.
Collector's Note This also adds thumbnail tooltips when you hover a bookmark, in the sidebar and menu
HandyTag simply providing a complete set of most relevant keywords in the bookmark's edition panel. These keywords are retrieved from many different sources.
HYPER-ANCHOR is the next generation of bookmark. You can make HYPER-ANCHOR for any element of a webpage (sentence, image, table, etc...), and put it into the bookmark menu. When you use HYPER-ANCHOR from the menu, you can easily return to the element...