There will be some new anti-ad tech becoming popular if first-party ads become a thing. For instance, I could think of some browser plugin that looks for visibl

There will be some new anti-ad tech becoming popular if first-party ads become a thing. For instance, I could think of some browser plugin that looks for visible DOM elements that change between refreshes. To deal with false positives it could grey them out initially but offer a button to really block/allow for future refreshes.