Social Bookmarking Site

Thank you for visiting Social Bookmarking Site. Social bookmarking is a method for Internet users to share, organize, search, and manage bookmarks of web resources. Unlike file sharing, the resources themselves aren’t shared, merely bookmarks that reference them. In a social bookmarking system, users save links to web pages that they want to remember and/or share. These bookmarks are usually public, and can be saved privately. Most social bookmark services encourage users to organize their bookmarks with informal tags. Extra features on some bookmarking sites are the  ability to rate bookmarks, or comment on them.

Many have the ability to import and export bookmarks from browsers. With finding the right information quickly the main purpose of the web for most people – some have turned to social bookmarking sites rather than the more mechanistic methods used by the major search engines.

Anyone know of a bookmark organizer for Firefox, for free or dirt cheap?

Not looking for a “social bookmarking” site… I have thousands of bookmarks and I want to be able to organize them with a drag & drop interface. I realize Firefox’s built-in bookmark manager will allow this, but I’m looking for something a little more robust. Ideally, something that has a preview screen of the bookmark’s corresponding web page, a built-in link checker (finding bookmarks that link to dead pages), and maybe some kind of “optimizer” that will check my bookmarks on-demand or automatically & alert me to duplicates and newly-deceased current bookmarks. I know there’s an extension that will alert you when you try to add a new bookmark that already exists, but it’s not really what I want.

It can be web-based or stand-alone, but if it’s web-based, I want the ability to keep my bookmarks private.

THANKS!