FireDragon (my understanding is that FireDragon is built from LibeWolf) and LireWolf is a custom and independent version of Firefox, with the primary goals of privacy, security and user freedom. LibreWolf (and FireDragon I assume) is designed to increase protection against tracking and fingerprinting techniques, while also including a few security improvements.
I don’t use either, I use just firefox so maybe a user of FireDragon could give you more.
Edit: Take a look at Jao’s post again, he updated it with more info on FireDragon.