If anti-vaccine people such as the developer of this tool liked Wikipedia and thought that donating to it would advance their cause, that would be worrying.
So by trying to undermine these information sources they demonstrate how important they are.
The CEO pay for Wikipedia doesn't bother me, I mean, Wikipedia is singularly successful. Those donation nags are annoying and I am sure you can find all sorts of things wrong in a big project like that, but Wikipedia works. (I only wish we had fewer deletionists and more detailed pages on subjects like [1])
Mozilla is a different story, that really is an organization that is drifting, bleeding market share, and indifferent to the 99% of web users and developers outside the bay area. On the other hand, if they moved their headquarters to Dublin or Denver or even Bakersfield or San Luis Obispo I'd be happy if the CEO got 10x the pay. So long as they are an hour's drive away from Facebook and Google they just won't listen to "the rest of us"
That's how you know this project is a joke.