How to block unwanted banner ads using Firefox Add-on 'Adblock Plus'
In this screencast, we look at how to download one of the many ad-blocking extensions from the Mozilla Firefox add-ons.
This one allows you to go to any site, right click on an object and block it from opening again completely. You can always undo this by right clicking the object again and viewing your blocked list and clicking the cross next to the particular banner you want to get back.
You can get to the main Firefox Add-on page by clicking here.