Bug 1648679 - Backed out changeset c29a908bc582. rs=backout DONTBUILD

--HG--
extra : rebase_source : b7233c3555f2300f0c1ba0169bbac56ee8e2eb02
extra : amend_source : d3fc90375b075452252cf7382f8435d2045ed348

mail/base/content/mailWindow.js

@@ -225,7 +225,7 @@ function InitMsgWindow() {
   msgWindow.rootDocShell.allowAuth = true;
   msgWindow.rootDocShell.appType = Ci.nsIDocShell.APP_TYPE_MAIL;
   // Ensure we don't load xul error pages into the main window
-  // msgWindow.rootDocShell.useErrorPages = false;
+  msgWindow.rootDocShell.useErrorPages = false;
 
   document.addEventListener("copy", onCopyOrDragStart, true);
   document.addEventListener("dragstart", onCopyOrDragStart, true);

mail/components/addrbook/content/addressbook.js

@@ -241,7 +241,7 @@ function delayedOnLoadAddressBook() {
   };
 
   // Ensure we don't load xul error pages into the main window
-  // window.docShell.useErrorPages = false;
+  window.docShell.useErrorPages = false;
 
   MailServices.mailSession.AddMsgWindow(msgWindow);