Firefox has so much built-in tracking it seems they want to push me to build my own browser. For example every time you open the settings there are several ways they are sending out pings to certain extensions.
Also by default addons.mozilla.org is a privileged site so of course they include google tracking in it and they get the proper fingerprint no matter what you have configured.
If you are this motivated (I am!), how about joining forces on Konform Browser? Radio silence and remote third-party integrations disabled by default and generally sane and conservative defaults respecting old-fashioned notions like individual consent and data-protection regulations.
Aside from general dev, could use a hand in bringing it to more platforms (mobile and flatpak are frequently asked) and taking a closer look at fingerprinting protections and what's currently tripping up the turnstile.
https://codeberg.org/konform-browser/source