Open-source tests of web browser privacy.
[EDIT] - Check the comments for more information and links π½ π½ π½
[Edit Edit] - Brave Browser caught adding its own referral codes to some cryptocurrency trading sites - More in the comments π½ π½ π½
Yes it does both of those things, Librewolf is just Firefox pre-configured for privacy. You could use Librewolf or you could configure firefox yourself to be equally private, Librewolf is just taking advantage of the features built into FIrefox but left optional for users.
Do you know of any guides to configure Firefox to be as private as LibreWolf?
This website has a really extensive writeup on Firefox privacy and security hardening that I learned a couple of tricks from.
Besides that, you can search the Mozilla support forums as there are tons of threads there with questions and answers about Firefox privacy and security.