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Mozilla faces a privacy complaint over Firefox's tracking
(www.engadget.com)
This is a most excellent place for technology news and articles.
Their acquisition of Anonym was all about acquiring the feature this article is about, PPA. Anonym created PPA. In fact Anonym seems to have been created for the explicit purpose of creating this privacy-respecting system as an alternative to cross-site tracking cookies. I see no reason to doubt Mozilla's intentions here.
Sorry I thought they were a separate thing. Thanks for bringing it up.