Shumway doesn't decompile ABC bytecode to ActionScript, it compiles it to JavaScript, which is then evaluated. It has a from-scratch JIT engine that analyzes th

Shumway doesn't decompile ABC bytecode to ActionScript, it compiles it to JavaScript, which is then evaluated. It has a from-scratch JIT engine that analyzes the bytecode and generates JS. https://github.com/mozilla/shumway/blob/master/src/avm2/compiler/builder.ts https://github.com/mozilla/shumway/blob/master/src/avm2/comp... I've worked a lot with Flash bytecode and contributed to Shumway a long time ago, so if you have any more questions, let me know!