--- navigator-14a-ori.js	Wed Apr  2 22:46:14 2003
+++ navigator.js	Wed Apr  2 22:46:27 2003
@@ -1175,11 +1175,11 @@
   if (url.match(/^view-source:/)) {
     BrowserViewSourceOfURL(url.replace(/^view-source:/, ""), null, null);
   } else {
-    // Check the pressed modifiers: (also see bug 97123)
+    // Check the pressed modifiers: (also see bug 97123, 37867)
     // Modifier Mac | Modifier PC | Action
     // -------------+-------------+-----------
-    // Command      | Control     | New Window/Tab
-    // Shift+Cmd    | Shift+Ctrl  | New Window/Tab behind current one
+    // Command      | Control     | New Window/Tab and/or URL AutoCompletion(reads settings from prefs)
+    // Shift+Cmd    | Shift+Ctrl  | New Window/Tab and URL AutoCompletion(reads settings from prefs) behind current one
     // Option       | Shift       | Save URL (show Filepicker)
 
     // If false, the save modifier is Alt, which is Option on Mac.
@@ -1198,45 +1198,77 @@
       shiftPressed = aTriggeringEvent.shiftKey;
     }
 
+    // Read user settings from preferences for what to do with Ctrl+Enter.
+    // Turn both variables to false for old behavior of open new window/tab.
+    var useAutoCompletionOnly = false;       // use autocompletion and no new window/tab for Ctrl+Enter
+    var useAutoCompletionNewWindow = false;  // use autocompletion with new window/tab for Ctrl+Enter
+    // Read from the prefs(all.js) section "URI fixup prefs"
+    try {
+      useAutoCompletionOnly = pref.getBoolPref("browser.fixup.ctrl_enter.autocompletion_only");
+      useAutoCompletionNewWindow = pref.getBoolPref("browser.fixup.ctrl_enter.autocompletion_newwindow");
+    }
+    catch (ex) {}
+
     url = getShortcutOrURI(url);
-    // Accept both Control and Meta (=Command) as New-Window-Modifiers
+    // for URL autocompletion, URL parsing
+    const knsIURIFixup = Components.interfaces.nsIURIFixup;
+    const kURIFixup = Components.classes["@mozilla.org/docshell/urifixup;1"].getService(knsIURIFixup);
+
+    // Accept both Control and Meta (=Command) as New Window/Tab or AutoCompletion Modifiers
     if (aTriggeringEvent &&
         (('ctrlKey' in aTriggeringEvent && aTriggeringEvent.ctrlKey) ||
          ('metaKey' in aTriggeringEvent && aTriggeringEvent.metaKey))) {
-      // Check if user requests Tabs instead of windows
-      var openTab = false;
-      try {
-        openTab = pref.getBoolPref("browser.tabs.opentabfor.urlbar");
-      }
-      catch (ex) {}
 
-      if (openTab && getBrowser().localName == "tabbrowser") {
-        // Open link in new tab
-        var t = getBrowser().addTab(url);
-        // Focus new tab unless shift is pressed
-        if (!shiftPressed)
-          getBrowser().selectedTab = t;
+      if (useAutoCompletionOnly && !useAutoCompletionNewWindow && !shiftPressed)  {
+        // only Ctrl+Enter was pressed
+        // Autocomplete the string entered by the user.
+        // Do domain-autocompletion before page load. If we don't autocomplete before page loads, then 
+        //   Mozilla will autocomplete the URL after the first DNS lookup failed. 
+        //   So, this save a DNS lookup and time. Also, makes an IE like Ctrl+Enter feature.
+        url = kURIFixup.createFixupURI(url, knsIURIFixup.FIXUP_FLAGS_MAKE_ALTERNATE_URI).spec;
+        // Display the new URL in the URL bar
+        gURLBar.value = url;
+        
+        // Load the new URL
+        loadURI(url);
+        content.focus();
       }
-      else {
-        // Open a new window with the URL
-        var newWin = openDialog(getBrowserURL(), "_blank", "all,dialog=no", url);
-        // Reset url in the urlbar, copied from handleURLBarRevert()
-        var oldURL = getWebNavigation().currentURI.spec;
-        if (oldURL != "about:blank") {
-          gURLBar.value = oldURL;
-          SetPageProxyState("valid", null);
+      else {      
+        // Check if user requests Tabs instead of windows
+        var openTab = false;
+        try {
+          openTab = pref.getBoolPref("browser.tabs.opentabfor.urlbar");
         }
-        else
-          gURLBar.value = "";
+        catch (ex) {}
 
-        // Focus old window if shift was pressed, as there's no
-        // way to open a new window in the background
-        // XXX this doesn't seem to work
-        if (shiftPressed) {
-          //newWin.blur();
-          content.focus();
+        if (useAutoCompletionNewWindow) {
+          // Autocomplete the string entered by the user before opening the new window/tab.
+          url = kURIFixup.createFixupURI(url, knsIURIFixup.FIXUP_FLAGS_MAKE_ALTERNATE_URI).spec;
         }
-      }
+
+        if (openTab && getBrowser().localName == "tabbrowser") {
+          // Open link in new tab
+          var t = getBrowser().addTab(url);
+          // Focus new tab unless shift is pressed
+          if (!shiftPressed)
+            getBrowser().selectedTab = t;
+        }
+        else {
+          // Open a new window with the URL
+          var newWin = openDialog(getBrowserURL(), "_blank", "all,dialog=no", url);
+          // Reset url in the urlbar, copied from handleURLBarRevert()
+          var oldURL = getWebNavigation().currentURI.spec;
+          if (oldURL != "about:blank") {
+            gURLBar.value = oldURL;
+            SetPageProxyState("valid", null);
+          }
+          else
+            gURLBar.value = "";
+
+          // Here we should check whether to open the window in the background(give focus to the old window), 
+          // but opening windows in the background is not possible (yet)
+        }
+      }     
     }
     else if (saveModifier) {
       try {