EmulatorJS 4.2.3 (unmodified stable CDN files), GPL-3.0.
License: LICENSE
Corresponding source: https://github.com/EmulatorJS/EmulatorJS/tree/v4.2.3
Upstream: https://github.com/EmulatorJS/EmulatorJS
Core build sources: https://github.com/EmulatorJS/build
Core licenses are embedded in each downloaded .data package and displayed by EmulatorJS.
Asset hashes and origins: data/asset-manifest.json

TheRealRift custom Flycast WASM VMU bridge: GPL-2.0-or-later.
Base source: https://github.com/flyinghead/flycast/tree/2c48c01
WASM port: https://github.com/nasomers/flycast-wasm
Exact patches, build inputs and instructions: included Dreamcast update source/.
VMU LCD output is separate from the game framebuffer; VMU overlays are disabled.