A Firefox add-on that lets you connect to an FTP server and synchronize your bookmarks
Synchronizes your bookmarks with other computers.
SyncMarks – Firefox add-on that allows you to synchronize your bookmarks.
BookmarkSync Toolbar – Firefox add-on that adds a powerful collection to your Firefox privacy tools.
A Firefox add-on that syncs with del.icio.us. bookmarks
dotBookmark works as a Bookmarks/Favorites replacement, allowing users to “take” their bookmarks to any PC and keep them synchronized with the user’s bookmarks on the WEB-server.