This is not a good look, but neither is all the entitled outrage it's provoking. Nobody owes us Firefox. It costs money to produce and maintain software, and a web browser is the most complicated software there is. Obviously Mozilla has made mistakes but it's also holding the fort against a complete corporate takeover of the internet. Switching to LibreWolf is a quick fix, it's not a sustainable solution. Volunteers alone will never have the organization or resources to maintain a world-class web browser. We are going to need to help Mozilla find a better way to viability.
If only they would offer the chance to opt out of this against a reasonable subscription fee, I personally would jump at that chance.