Explore the world of pixel tracking in this 47-minute conference talk that delves into its uses and abuses. Learn about the fundamentals of pixels, browser data collection, email tracking techniques, and online surveillance methods. Discover the darker aspects of pixel technology, including various types of data leaks and steganography examples. Examine plugin options, controversies surrounding pixel tracking, and protective measures such as Thunderbird's PixelBlock and Google's targeting plugin ad blockers. Investigate privacy tools like Privacy Badger and firewall packages, and gain insights into interesting sites related to pixel tracking. This comprehensive presentation covers essential topics for understanding the impact of pixel tracking on online privacy and security.