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@@ -4812,11 +4812,13 @@ BrowserGlue.prototype = { | 
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4812
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4812
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   _migrateUIBB() {
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4813
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4813
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     // Version 1: 13.0a3. Reset layout.css.prefers-color-scheme.content-override
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4814
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4814
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     //            for tor-browser#41739.
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4815
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-    // Version 2: 14.0a5:Reset the privacy tracking headers preferences since
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+    // Version 2: 14.0a5: Reset the privacy tracking headers preferences since
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4816
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     //            the UI is hidden. tor-browser#42777.
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     //            Also, do not set
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4818
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     //            dom.security.https_only_mode_send_http_background_request in
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     //            the security level anymore (tor-browser#42149).
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+    //            Also, reset security.xfocsp.errorReporting.automatic since we
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+    //            hid its neterror checkbox. tor-browser#42653.
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     const MIGRATION_VERSION = 2;
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     const MIGRATION_PREF = "basebrowser.migration.version";
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     // We do not care whether this is a new or old profile, since in version 1
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@@ -4836,10 +4838,11 @@ BrowserGlue.prototype = { | 
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         "privacy.donottrackheader.enabled",
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         // Telemetry preference for if the user changed the value.
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         "privacy.globalprivacycontrol.was_ever_enabled",
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4839
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-        // The last two preferences have no corresponding UI, but are related.
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+        // The next two preferences have no corresponding UI, but are related.
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         "privacy.globalprivacycontrol.functionality.enabled",
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         "privacy.globalprivacycontrol.pbmode.enabled",
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         "dom.security.https_only_mode_send_http_background_request",
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+        "security.xfocsp.errorReporting.automatic",
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       ]) {
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         Services.prefs.clearUserPref(prefName);
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       }
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