Microsoft has announced that starting on 31 March 2016 it will begin blocking ad-injection methods which use a variety of “Man in The Middle” techniques, such as injections through proxy, changing DNS settings and network layer manipulation. The update follows Microsoft's former announcements on this matter in addition to the policy and enforcement measures which it had taken, addressing unwanted behaviors exhibited by advertising programs which take away both choice and control from users.

According to Microsoft, it is the company's aim to keep the users’ control of the browsing experience and to disable advertising operated by any software located outside the browser. The Objective Criteria will require that: "programs that create advertisements in browsers must only use the browsers’ supported extensibility model for installation, execution, disabling, and removal".

The abovementioned requirement aligns with Google's similar policy reflected in its Malware and Unwanted Software Guidelines which, as previously reported by us in various updates, require that any and all changes to the browsing experience and functionality be done by an extension  approved by the Chrome Store and solely via an in-line installation process.