Much more info on this in the article: https://www.theregister.co.uk/2019/01/22/google_chrome_browser_ad_content_block_change/
Google engineers have proposed changes to the open-source Chromium browser that will break content-blocking extensions, including various ad blockers.
Adblock Plus will most likely not be affected, though similar third-party plugins will, for reasons we will explain. The drafted changes will also limit the capabilities available to extension developers, ostensibly for the sake of speed and safety. Chromium forms the central core of Google Chrome, and, soon, Microsoft Edge.
In a note posted Tuesday to the Chromium bug tracker, Raymond Hill, the developer behind uBlock Origin and uMatrix, said the changes contemplated by the Manifest v3 proposal will ruin his ad and content blocking extensions, and take control of content away from users.
But one way Google would like to achieve these goals involves replacing the webRequest API with a new one, declarativeNetRequest.
The webRequest API allows browser extensions, like uBlock Origin, to intercept network requests, so they can be blocked, modified, or redirected. This can cause delays in web page loading because Chrome has to wait for the extension. In the future, webRequest will only be able to read network requests, not modify them.
This is a key point to note: Google and other internet advertising networks apparently pay Adblock Plus to whitelist their online adverts, hence the special love for this particular plugin – and the middle finger to everyone else. Meanwhile, Google has bunged its own basic ad blocking into its browser.
Several other developers commenting on the proposed change expressed dismay, with some speculating that Google is using privacy as a pretext for putting the interests of its ad business over those of browser users.