I usually defend Mozilla with these things, but I'm a bit bearish on this. It's not like they're not relying on big partnerships already for their survival. I don't have a problem with free to long as there is a paid plan, which I don't see on their announcement page. I don't care who is running a free-only VPN is a huge red flag, and I am one of those people that recommends using VPN services instead of running your thing on a VPS or something.

What worries me is this will get adoption and they're start talking about profiting from it via "differential privacy"

Or, even worse for the web is a more realistic problem: Firefox is notoriously hard to manage in an enterprise fleet. Their biggest hurdle to marketshare is just that, chrome works well with windows, linux and mac a like and lends itself to management. I'm frequently fighting to be allowed to use Firefox already personally. This poses a direct threat to enterprise security policies. Anyone who bans random free vpns in their networks, now has to include Firefox to that list. And I don't need to mention how bad that is for the web given Google will effectively be the gatekeeper of the entire internet, even the tiny marketshare Mozilla has will be crushed. I wonder if in retrospect, this seemingly mundane feature would be the death-blow to the only alternative browser ecosystem.