yokoffing/Betterfox ? reverse-engineered prompt

Build me a Betterfox style Firefox setup that makes the browser feel faster, cleaner, and more private without breaking normal sites.

I want a simple set of Firefox config files that I can drop into a profile, plus a small installer script that helps apply them. The main goal is an easy to use user.js with the essential privacy and security tweaks, along with separate options for stricter security, hiding annoying browser clutter, and smoother scrolling. Keep it opinionated, practical, and focused on everyday browsing, not extreme hardening.

Please include clear notes in the README about how to install it, how to back up a profile first, and what settings are optional if someone wants to change behavior. If useful, organize things so it works for Firefox and a couple common Firefox based browsers too. Make sure the defaults are safe, minimal, and aimed at better speed, privacy, and security with as little site breakage as possible. If you need to check current Firefox docs or behavior, look up the latest info online.