Nobody’s saying that adblockers cooked up for the newly adblocker-amenable iOS 9 Safari browser were monitoring encrypted traffic, including, say, bank login details or private emails. But they could, given that some of those apps installed root certificates that allowed them to carry out deep packet inspection in order to filter out ads. Given the...

The morality of blocking ads is a perplexing dilemma. That was made clear when Marco Arment – developer of the Peace ad-blocker that shot to the top of Apple’s paid app list when Apple rolled out iOS 9 and allowed users to add ad-blocking extensions for the first time – pulled a 180-degree turn and...