Uhh two of those are primarily services with dedicated clients not just software.
I totally agree with the article otherwise. I don't want to donate to the foundation to support Firefox. They'll just use it for side projects and it does nothing to reduce their dependency on Google. Just let me pay for a version of firefox that has a nice contributor badge, and doesn't have Google as a search engine installed. It doesn't have to be something that's worth the money.
Also they could make the sync service paid. And reduce the free version. I'd gladly pay for it. They've said they'll never make us pay for it but I don't understand why not. It's a service that costs money on an ongoing basis.
IMO they should also go back to a more community driven approach. Not treat themselves as a mega corp with an overpaid CEO. But more like a startup. Because really, size-wise they're only startup sized. The only reason they pretend to be a big tech is because they have so much Google money to throw strong. A project like KDE (Which I sponsor monthly) provides a lot more software without all this overhead, and works much better along with the community. This is how I would love to see Mozilla.
But maybe ladybird will be what I'm looking for.