Bug 853996 - Make sure that opening a new window in permanent private browsing mode never shows about:privatebrowsing; r=jdm

browser/base/content/browser.js

@@ -3641,8 +3641,10 @@ function OpenBrowserWindow(options)
   var extraFeatures = "";
   if (options && options.private) {
     extraFeatures = ",private";
-    // Force the new window to load about:privatebrowsing instead of the default home page
-    defaultArgs = "about:privatebrowsing";
+    if (!PrivateBrowsingUtils.permanentPrivateBrowsing) {
+      // Force the new window to load about:privatebrowsing instead of the default home page
+      defaultArgs = "about:privatebrowsing";
+    }
   } else {
     extraFeatures = ",non-private";
   }