Waterfox is the safe bet, it’s basically just regular Firefox repacked with better defaults and telemetry turned off, but it isn’t harden or has add-ons included.
LibreWolf is what I switched to over a year ago, The team behind it have been pretty thorough in scraping out spyware and it comes pre-hardened out the box (but that can break more invasive websites).
Waterfox is the safe bet, it’s basically just regular Firefox repacked with better defaults and telemetry turned off, but it isn’t harden or has add-ons included.
LibreWolf is what I switched to over a year ago, The team behind it have been pretty thorough in scraping out spyware and it comes pre-hardened out the box (but that can break more invasive websites).