Dash-Chan browser flasher uses the unmodified esptool-js 0.7.0 browser bundle.
Espressif esptool-js: Apache-2.0, https://github.com/espressif/esptool-js
Its bundled runtime dependencies are pako 2.1.0 (MIT AND Zlib) and atob-lite 2.0.0 (MIT).
Original license files are in this directory; dependencies.json records exact tarballs and integrity values.
No runtime CDN, analytics, or external font dependency is used.