Adblock Plus Pop-up Addon

Adblock Plus Pop-up Addon extends the blocking functionality of Adblock Plus to those annoying pop-up windows that open on mouse clicks and other user actions.

By default, Firefox or Adblock Plus doesn't block any pop-ups that are opened on mouse clicks or other user events. This addon complements Adblock Plus with the pop-up blocking functionality.

There are two ways of getting rid of an unwanted pop-up with this addon:

Adding the pop-up's url to Adblock Plus' filters. This will block just the individual pop-up (or any other pop-up which matches the pattern you decide to write).
Creating a site rule in this addon's preferences for the opener site. This will prevent the opener site from opening pop-ups completely. This is especially useful for sites that change their pop-up urls frequently.

You can do both of these tasks easily by right clicking on the pop-up window and selecting "Block this window".