Unfortunately the article series is in German only. But it gives a very detailed description of how a browser reacts and what settings to choose if you want to keeps it from calling home or somewhere else (if it's possible).
The series starts here (for those interested and understand German):
@aral Also this is not meant as criticism on you or your statement. I was just impressed who detailed it was written and the browsers were analyzed. That's all. I hope it was ok to drop this here.
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