@hannahshouse2@toot.community @louisrcouture @eff Firefox enables Total Cookie Protection by default. It isolates cookies between sites, which is the superior approach; it's used by Tor Browser for example.
You don't need that many privacy extensions overall. Some of them might be redundant. Personally, I just use uBlock Origin when it comes to privacy extensions. When you want the most online privacy a regular person can get right now, use Tor Browser. Avoid changing settings and installing extensions in it.