A real Firefox/Gecko build, repackaged with LuisSearch preconfigured as the default search engine via Firefox's own enterprise policy system -- same rendering engine, different default.
tar --zstd -xf luisbrowser-linux-x64.tar.zstcd luisbrowser./luisbrowserdistribution/policies.json that sets LuisSearch as the enforced default search engine, disables telemetry/Pocket, and points the homepage at LuisBrowser welcome page. No recompilation of Gecko.
LuisBrowser.app, built by an actual GitHub Actions macOS runner (not faked from Linux) -- Apple's disk-image compression inside the official Firefox .dmg can't be unpacked or repacked from Linux (verified: standard extraction tools can read the partition table but not decompress the filesystem inside), so this was built on real macOS, then ad-hoc code-signed so it will actually launch. It isn't notarized by Apple, so Gatekeeper will show an "unidentified developer" warning the first time -- that's expected for an independent build, not a bug. Windows isn't packaged yet.