Consider disabling remote Public Suffix List fetching

In https://bugzilla.mozilla.org/show_bug.cgi?id=1563246 Firefox started fetching the PSL via RemoteSettings and replacing the default one at runtime. AFAIK this would override our changes in effective_tld_names.dat from #28005 (closed), so we should consider a patch to disable this.

Edited Aug 05, 2020 by Alex Catarineu

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