Back in February, I visited Mozilla to present my research on dynamic language optimization and learn more about the architecture of the JIT compiler that powers Mozilla Firefox. I was a little worried about my own talk, trying to fit 70 slides into 55 minutes and touching on many different subjects: dynamic languages, Higgs, my research, a small critique of D, and the potential use of a JIT compiler for D's Compile-Time Function Execution (CTFE). After running into some issues with tracing, I decided that a method JIT would make more sense, and so I spent a few days converting the Higgs JIT to be method-based instead; fortunately, this went surprisingly smoothly.