"At Microsoft, we are committed to fostering a healthy web ecosystem where everyone can thrive – consumers, publishers, advertisers, and platforms alike. Protecting user privacy is foundational to that commitment and is built into Microsoft Edge with features like Tracking Prevention, Microsoft Defender SmartScreen, and InPrivate browsing. We also support an ad-funded web because we don't want to see a day where all quality content has moved behind paywalls, accessible to only those with the financial means.

Through this proposal, we believe we can substantially improve end-user privacy while retaining the ability for sites to sustain their businesses through ad funding. We propose a new set of APIs that leverage a browser-trusted service to develop a sufficient understanding of user interests and therefore enable effective ad targeting without allowing ad networks to passively track users across the web. This approach removes the need for cross-site identity tracking, enables new privacy enabling methods to support monetization, and maintains ad auction functionality within existing ad tech ecosystems."