Explore advanced Rust programming concepts in this comprehensive conference talk featuring presentations from multiple Mozilla team members. Dive into Paul Stansifer's "Handsome Macros in Rust," demystifying macros and demonstrating their power in reducing code repetition. Learn about code coverage exploration in Mozilla from Joshua Cranmer, and gain insights into sandboxing Firefox with Marshall Moutenot's security-focused presentation. Discover applied statistics in Mozilla's performance testing as Joseph Kelly discusses modeling ADIs. Throughout the talk, encounter topics such as early return macros, old and new macro systems, the Chromium sandbox, Firefox addons, resource usage patterns, and potential solutions for various challenges in Rust and Mozilla development.