Modern browsers share a "standard" list of APIs for plugins, that makes it possible to write a plugin that runs in both Chrome and Firefox. Google decided to re

Modern browsers share a "standard" list of APIs for plugins, that makes it possible to write a plugin that runs in both Chrome and Firefox. Google decided to remove several APIs for "performance" and "privacy" reasons from the third version of that list. It just happens that all dropped APIs where used by ad blockers and that some of the announced "replacement" APIs weren't even able to handle the most commonly used static block lists. As far as I understand the replacement APIs where developed in cooperation with Ad block plus, which just happens to allow Googles ads under its acceptable ads program.