diff --git a/browser/base/content/browser-sets.inc b/browser/base/content/browser-sets.inc
index d3d9748d2a1f..3a38346bd605 100644
--- a/browser/base/content/browser-sets.inc
+++ b/browser/base/content/browser-sets.inc
@@ -196,7 +196,7 @@
          key="&newNavigatorCmd.key;"
          command="cmd_newNavigator"
          modifiers="accel"/>
-    <key id="key_newNavigatorTab" key="&tabCmd.commandkey;" modifiers="accel" command="cmd_newNavigatorTab"/>
+    <key id="key_newNavigatorTab" key="&tabCmd.commandkey;" modifiers="accel" oncommand="BrowserOpenTab();"/>
     <key id="focusURLBar" key="&openCmd.commandkey;" command="Browser:OpenLocation"
          modifiers="accel"/>
 #ifndef XP_MACOSX
diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index 4e6b8bbe9500..4bd0c82e94f4 100755
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -979,7 +979,6 @@ var gBrowserInit = {
       // adjust browser UI for popups
       gURLBar.setAttribute("readonly", "true");
       gURLBar.setAttribute("enablehistory", "false");
-      goSetCommandEnabled("cmd_newNavigatorTab", false);
     }
 
     // Misc. inits.
@@ -1901,16 +1900,8 @@ function BrowserOpenTab(event) {
       case "tab":
       case "tabshifted":
         // When accel-click or middle-click are used, open the new tab as
-        // related to the current tab. We need to exclude key events here,
-        // where the accel key is required for the shortcut.
-        // 'event' and its sourceEvent are command events, the latter of which
-        // doesn't have its own sourceEvent. These events don't indicate how
-        // they were invoked, except that the sourceEvent for keyboard
-        // shortcuts have <key> targets, and those for clicking a toolbar
-        // button or activating a menu item have that button or menuitem as
-        // their target.
-        relatedToCurrent = !event.sourceEvent ||
-                           event.sourceEvent.target.localName != "key";
+        // related to the current tab.
+        relatedToCurrent = true;
         break;
       case "current":
         where = "tab";
diff --git a/browser/base/content/test/general/browser_popupUI.js b/browser/base/content/test/general/browser_popupUI.js
index 55c9d45fec4f..2476beb6c7cc 100644
--- a/browser/base/content/test/general/browser_popupUI.js
+++ b/browser/base/content/test/general/browser_popupUI.js
@@ -44,6 +44,8 @@ function testPopupUI(win) {
 
   EventUtils.synthesizeKey("t", { accelKey: true }, win);
   is(win.gBrowser.browsers.length, 1, "Accel+T doesn't open a new tab in the popup");
+  is(gBrowser.browsers.length, 2, "Accel+T opened a new tab in the parent window");
+  gBrowser.removeCurrentTab();
 
   EventUtils.synthesizeKey("w", { accelKey: true }, win);
   ok(win.closed, "Accel+W closes the popup");