libheif-js 1.23.5 (libheif compiled to WebAssembly), unmodified.
License: GNU LGPL v3 (see LICENSE.txt). Library source: https://github.com/strukturag/libheif
JS/wasm build: https://github.com/catdad-experiments/libheif-js (npm: libheif-js@1.23.5, files libheif-wasm/libheif.js + libheif.wasm).
Loaded as separate, replaceable files only when a HEIC/HEIF image is opened.