Explore the ongoing battle between ad blockers and circumvention techniques in this 19-minute conference talk from JSConf EU 2019. Delve into the rise of ad blocking software and the subsequent emergence of a micro-industry dedicated to bypassing these blockers for publishers. Discover the creative methods employed to circumvent ad blockers, including exploiting browser bugs and limitations of browser extensions. Learn how ad blockers have responded with their own innovative countermeasures. Gain insight into this fascinating cat-and-mouse game through case studies, understanding the gaps and challenges in the industry. Uncover the inner workings of ad blockers and the ingenious strategies used in this little-known technological arms race.