I would no longer call Firefox a “privacy browser”. Any browser that want you to sign in is not a privacy browser, not to mention that they support cancel culture. I would not be surprised to learn that their pronouncements about privacy are a ruse to get you to lower your guard. They are not to be trusted.
The article details on Firefox mentions their concern about Mozilla advocating for Internet censorhip, but stated their belief that Firefox is still a good privacy browser.
As for me and my house, Firefox Delenda Est!