That article on Adblock Plus, and the original German article, are full of unfounded speculation and innuendo. My own experience with Adblock Plus confirms the behaviour described on http://adblockplus.org/en/acceptable-ads I have not examined the source code to be able to refute the accusations in the articles, but Adblock Plus works as advertised :-) I've created my own strict block list at http://sobac.com/ZIPfiles/Internet/Web/Browsers/Firefox/Extensions/adblock-strict.txt Feel free to include it if you want to block more ads. Original German article at http://www.mobilegeeks.de/adblock-plus-undercover-einblicke-in-ein-mafioeses-werbenetzwerk (which is full of ads that get blocked, BTW. Perhaps there's a bit of conflict-of-interest going on there?)