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@@ -1240,6 +1240,15 @@ user_pref("security.block_script_with_wrong_mime", true);
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// WARNING: SVG is fairly common (~15% of the top 10K sites), so will cause some breakage
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// https://bugzilla.mozilla.org/show_bug.cgi?id=1216893
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user_pref("svg.disabled", true);
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+// 2672: force Punycode for Internationalized Domain Names to eliminate possible spoofing security risk
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+ // Firefox has *some* protections to mitigate the risk, but it is better to be safe than sorry.
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+ // The downside: it will also display legitimate IDN's punycoded, which might be undesirable for
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+ // users from countries with non-latin alphabets
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+ // http://kb.mozillazine.org/Network.IDN_show_punycode
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+ // https://wiki.mozilla.org/IDN_Display_Algorithm
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+ // https://en.wikipedia.org/wiki/IDN_homograph_attack
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+ // CVE-2017-5383: https://www.mozilla.org/en-US/security/advisories/mfsa2017-02/
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+user_pref("network.IDN_show_punycode", true);
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/*** 2698: FIRST PARTY ISOLATION (FPI) ***/
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// 2698a: enable first party isolation pref and OriginAttribute (FF51+)
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earthlng