firefox: clear language settings

conf/firefox-forbidden-policies.js

@@ -58,7 +58,8 @@ lockPref(
 lockPref("image.animation_mode", "once");
 
 // Spoof en-US as language to scripts
-lockPref("privacy.spoof_english", 2);
+//lockPref("privacy.spoof_english", 2);
+clearPref("privacy.spoof_english");
 
 // More tunable privacy.resistfingerprinting.
 // Refer to https://searchfox.org/mozilla-central/source/toolkit/components/resistfingerprinting/RFPTargets.inc

etc/firefox/policies/policies.json

@@ -1008,8 +1008,8 @@
 				"Value": "once"
 			},
 			"intl.accept_languages": {
-				"Comment": "This is a bad idea.",
-				"Status": "user",
+				"Comment": "Languages requested from webpage. Exercise in frustation, leave reset for system locale.",
+				"Status": "clear",
 				"Type": "string",
 				"Value": ""
 			},
@@ -1188,7 +1188,7 @@
 			},
 			"privacy.spoof_english": {
 				"Comment": "Preference not allowed for stability reasons. :(",
-				"Status": "user",
+				"Status": "clear",
 				"Type": "number",
 				"Value": 2
 			},