It could be any one of a list of JS toolkits that they might have used being pulled down using Google as a CDN, or it could be a form of app analytics.
Discussion
Very disappointing.
Tbf, I have been concerned about this with a number of clients. Allowing YouTube embeds is just as bad from a tracking perspective. It would be good to convert YouTube links to invidious embeds instead.
Do you know other clients doing this as well? Which ones?
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