The beating heart of Firefly Zero. The runtime that runs the given app: executes wasm binaries, provides host functions, manages state, etc.
The runtime is sandwiched between the entry point (firefly-emulator or firefly-main) and firefly-hal.
See Firefly Zero docs to get started.
GPL 3.0. Any forks and extensions for Firefly must be open source. However, this does not affect apps and games running on Firefly Zero. You can make your apps free or paid, open-source or proprietary.