To add on (heh):

Temporary Containers is one of the better features of Firefox, it eats more RAM but isolates each tab from each other to help prevent tracking between sites that you visit. Set to 'automatic.' If you want to remain signed in to some sites you should pair it with Multi-Account containers which can create a persistent tab for a given site.

Canvas Blocker gives you a new, unique fingerprint per site (or tab? Idk) but the resist fingerprinting setting in about:config is probably better because it is more anonymous when your fingerprint is not unique but instead just like everyone else who has RFP on. I think "strict tracking protection" enables this

Privacy Possum is iirc a better replacement for Privacy Badger. Deletes cookies etc so you must sign in to every site anew every browser session. I forgot what else it does

Site isolation is a security feature available in Nightly called Project Fission, not very developed yet but security people say that site isolation is one of the most important features of browser security and is something that Chromium does much better than FF.