See this discussion surrounding the PREF cookie used with the Safe Browsing API:... | Hacker News

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		xenophonf on Jan 9, 2015 \| parent \| context \| favorite \| on: North Korea’s Naenara Web Browser: It’s Weirder Th... See this discussion surrounding the PREF cookie used with the Safe Browsing API: https://bugzilla.mozilla.org/show_bug.cgi?id=368255 According to Mozilla this cookie is only used by the Safe Browsing client code and isn't sent to Google through regular web browsing (private mode or otherwise). However, the Lumber Cartel (there is no Lumber Cartel) wood be able to use this cookie to fingerprint web browsers and so track people as they move among Internet connections. Those of us who are double super extra paranoid disable Safe Browsing in order to prevent this.

gcp on Jan 9, 2015 [–]

I didn't mention the cookie because it's not part of the protocol. It's how Google's servers behave. We don't know what the NK server does.

According to Mozilla...

Firefox is open source, you know. Even if you can't read C++ or understand the Bugzilla comments, you can also just Wireshark it.

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