"The deprecation of the blocking ability of the WebRequest API is to gain back this control, and to further now instrument and report how web pages are filtered

"The deprecation of the blocking ability of the WebRequest API is to gain back this control, and to further now instrument and report how web pages are filtered since now the exact filters which are applied to web page is information which will be collectable by Google Chrome." In the same way a company trying to determine what a user looks at on their computer screen is a privacy issue, this is too. Those filters should be private.