"Starting with Adblock Plus 2.0 you can allow some of the advertising that is considered not annoying. By doing this you support websites that rely on advertising but choose to do it in a non-intrusive way. And you give these websites an advantage over their competition which encourages other websites to use non-intrusive advertising as well. In the long term the web will become a better place for everybody, not only Adblock Plus users. Without this feature we run the danger that increasing Adblock Plus usage will make small websites unsustainable."However noble their mission, most Adblock Plus users would probably prefer to continue to block all ads. To change the behavior to revert back to blocking all ads, click the Adblock Plus icon in Firefox and select Filter preferences...
Then, un-check the option "Allow non-intrusive advertising"


