Five Great Bookmark Management Extensions for Firefox
Foxmarks : an extension for people with multiple computers
Do you use multiple computers or operating systems on one? If so, then the Foxmarks extension will help to automatically synchronize bookmarks between them. It also allows you to access bookmarks from the Internet . This is a very useful extension if you use public computers to access the network without being able to install anything on them. Foxmarks synchronizes your bookmarks by storing them on a remote server. With this extension, you will forget about backup bookmarks when formatting or changing computers. Also for security lovers there is an encryption option.Speed Dial : website icons on one page

The Speed Dial has many options for customizing each preview of your preferences. You can determine how often they will be updated. The extension can also save / load settings for use on other computers.
Delicious Bookmarks : integrating a Del.icio.us account in Firefox
This extension is not like the standard del.icio.us key that every user has. It gives easy access to del.icio.us bookmarks with their integration in Firefox. With it, you can quickly add existing bookmarks to del.icio.us and categorize them with tags. You can also search for bookmarks in del.icio.us from the browser.
GMarks : Google Bookmarks integration in Firefox
Do you use Google often? GMarks integrates bookmarks from Google Bookmarks directly into Firefox. GMarks makes it easy to migrate from / to Google Bookmarks. The extension can share existing bookmarks in Firefox with new ones and does not delete or erase them.Smart Bookmarks Bar : More free space on your bookmarks bar.
Other extensions
The following plugins are not included in the top 5, but are also worthy of mention here.To Read Later : this extension allows you to make temporary bookmarks on sites that you want to look at later.
Bookmark Duplicate Detector : as the name says, the extension monitors duplicate bookmark URLs when creating new ones. You just need to be careful and better backup the base.
What other extensions do you use?