[...] that the use of ad-blocking software grew 41 percent last year, with 198 million active users worldwide, according to a study conducted by Adobe and PageFair. This represents an existential threat to the $50 billion online advertising industry and has ignited a bitter feud between advertisers and developers of ad-blocking apps. On the sidelines, privacy advocates are pumping their fists for consumer choice while web publishers wring their hands over lost revenue.

Moreover, when Apple made ad blockers available in its App Store last fall, they quickly became among the most downloaded apps. And later this year, Microsoft is reportedly going to allow an extension to its Edge browser that supports the most popular blocker, Adblock Plus. Read what you will into the fact that Apple and Microsoft’s business models aren’t overly reliant on advertising, unlike their rivals Google and Facebook.