Mozilla is still the only company maintaining an alternative to Chromium (there’s also webkit if you count Apple). Without Firefox you can’t have Librewolf or other alternatives.

Mozilla is not perfect but people really need to stop treating them in a purely binary fashion (you are either horrible or are perfect).

You can criticize Mozilla for the direction they are taking with Firefox, but also you can argue that being a hardcore privacy-centric browser will kill interest for Firefox even faster.