That's what I was wondering - the article said that AdBlock Plus has dropped site blocking capability. this brings up a question;
I know AdBlock will filter
inbound connections from filtered sites. however, does using AdBlock filter rules prevent outbound connections
from the PC to the blocked site, or just
inbound from the filtered site - or does it block traffic in both directions?
If the filters don't block outbound, the Facebook spy data could still be sent from the PC to the folder.
EDIT - a quick packet capture shows that when I rely on AdBlocker filters, I still get outbound request to Facebook and a Facebook 404 reply is delivered to my browser. However, when I use BlockSite filters, the request to the URLs never get past the blocker and nothing shows up in the capture.
I conclude that outbound connections can be made to the URLs despite AdBlock filters, but BlockSite filters will stop them beofre the browser can even send the request.