Your own 2023 article doesn't say anything about policies allowing Mozilla to sell private data, and Mozilla's own website openly and proudly claims they neither buy nor sell their users' data.
And Anonym is a company purpose-created to try to transform the advertising industry into a more privacy-respecting industry. Its mission could not align more with Mozilla's. They in particular developed PPA, the feature Firefox was getting so much bad press about last week - and which ended up being none of the things the dozens of articles posted about it claimed. It is, in fact, a complete non-factor when it comes to privacy risks, and its explicit purpose is to pivot the internet toward a significantly more private ecosystem.
There are lots of people claiming Mozilla is becoming an advertising company and is selling their users out. There's some misleading evidence that even makes that superficially appear true. But it's false.
The fact that Mozilla hasn’t talked much about ad blockers since then is, I think, significant.
When have they talked about ad blockers in the past, period? This is just a meaningless scare tactic. I don't see them talking about arctic drilling either - should I be concerned?
From the same page you got your image from:

