I never install Firefox without it. Rated 5 out of 5 stars

Adblock has become the first Add-on I go to with any new installation of Firefox. It's easy to use and and does a great job at blocking ads. You can easily disable it on sites that you want support by allow ads and you can target particularly annoying ads easily with a click. The internet looks much cleaning and more pleasant with Adblock Plus.

This review is for a previous version of the add-on (2.0.3.1-signed).