Crusade into the wild world of malicious browser extensions. You will learn how to do keylogging, cookie stealing, credential harvesting and building a C&C server allowing you to execute arbitrary JavaScript remotely of your choosing. We will also be talking about CORS (Cross-Site Resource Sharing) and some interesting quirks with the browser extension environment. If you are a front-end developer and you want to dive into malicious code this would be the best way to start learning.