Snap Links
Snap Links is a Firefox Extension.
You can download it from the Firefox Add-Ons site.
This extension allows you to easily open mulitple links in new tabs.
Just right-click and drag your mouse over the links that you’d like to open. This will create a green box.
All of the links that fall inside of the green box will be opened.

In the above example, there are 3 links inside of the green box.
Release your right mouse button and all 3 will be opened in new tabs:

This is a very quick way to open multiple pages. I found this to be really helpful on sites like Digg, and even on search engines like Google.
Here is a screenshot of the Snap Links options window:
















