Violation of Review Guidelines Rated 1 out of 5 stars
I agree with access2godzilla review named "Embedded with spyware". Except I would not call it spyware but nm. Is still 100% against Developer Agreement rule no. 1, spelled out here https://addons.mozilla.org/en-US/developers/docs/policies/agreement
But problem is not new as the very first submission of this extension did same trickery, nearly 3 years ago. So there might be rules but if nobody cares? Is it even fair to give 1 star review? Why should developers care when AMO does not?
Look for cga.js which stands for "Custom Google Analytics". They are upfront about this in code but not bothered to inform users. They need rules then!