v153#2056
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@tomrittervg added a link to your blog about telemetry
FF151+ https://bugzilla.mozilla.org/show_bug.cgi?id=1874169 it's in the DON'T TOUCH section so no need to keep around for resetting
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Jul 11, 2026
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network.cookie.cookieBehavior.optInPartitioning hasn't been set to true in ETP Strict since FF137
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let's just remove it
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and that this pref actually does
It blocked all non‑CHIPS third‑party cookies, unless they were on an exemption list or certain heuristics also allowed them.
see https://bugzilla.mozilla.org/show_bug.cgi?id=1951443 - not used in ETP Strict since 137- in the DON'T BOTHER section, so no need to keep around for prefsCleaner
are default true in FF153+ ... every day, in little ways ... FF wants to be like arkenfox ~p
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@tomrittervg added a link to your blog about telemetry