@echo off set "BASE=%~dp0" "%BASE%core\firefox.exe" -no-remote -profile "%BASE%profile" -new-instance This script gives you a fully portable, update‑disabled Firefox 56 ready for legacy extensions.
It downloads Firefox 56.0.2 from the official Mozilla archive, extracts it, and creates a portable launcher with a custom profile folder — no installation required, fully self-contained. @echo off set "BASE=%~dp0" "%BASE%core\firefox