In this 48-minute conference talk from OffensiveCon25, Ivan Fratric explores the discovery and exploitation of decades-old vulnerabilities in web browsers. Delve into the methodology for identifying long-standing bugs that have remained hidden in browser codebases for up to 20 years. Learn about the technical challenges of exploiting these legacy vulnerabilities, the patterns that allowed them to persist undetected for so long, and the security implications they present. Gain insights into browser security architecture and how even modern browsers can harbor ancient flaws that bypass contemporary security measures.