While the article is from 2017, the relevance is high today.
Large adtech companies are coalescing and supporting a single browser framework that gives them a modicum of control around how adblockers are integrated into the extensions, while also funding directly or indirectly realistic browser competition through Firefox (sorry Brave and Vivaldi... still a ways to go market share-wise). The economist in me thinks there is formal and informal coordination to make this ad "market" exist (no one wants ads, really, they want search engines with relevant results) and there is exercise in market power to the detriment of businesses purchasing advertising (and waste to society writ large).
Large adtech companies are coalescing and supporting a single browser framework that gives them a modicum of control around how adblockers are integrated into the extensions, while also funding directly or indirectly realistic browser competition through Firefox (sorry Brave and Vivaldi... still a ways to go market share-wise). The economist in me thinks there is formal and informal coordination to make this ad "market" exist (no one wants ads, really, they want search engines with relevant results) and there is exercise in market power to the detriment of businesses purchasing advertising (and waste to society writ large).