This one cuts both ways, at least from a consumer perspective: Facebook is simultaneously making it easier for users to control what ads it shows them and harder for ad blockers to work on its site.
The new ad preferences let people tell Facebook not to serve them ads from particular companies that may be targeting them. If a consumer is on a brand’s email list, for example, she can prevent the brand from using her email to find her on Facebook. Facebook’s preferences will now show users the advertisers that have them on email lists, and present them with the option to stop receiving ads from those brands.
