From the article, near the very top:

"A joint effort with the European Space Agency (ESA) and Canadian Space Agency, the Webb mission will explore every phase of cosmic history – from within our solar system to the most distant observable galaxies in the early universe."

They changed the link. It pointed to a tweet initially.

I was under the impression that ESA's role was to get it into orbit, and is thus largely done. Is that wrong?

From Wikipedia:

> NIRSpec (Near InfraRed Spectrograph) will also perform spectroscopy over the same wavelength range. It was built by the European Space Agency at ESTEC in Noordwijk, Netherlands.

and more.

To be fair ESA contributed only with ~10% of total budget, and I guess much of that was the rocket.