diff --git a/AppKit/CPWindow/CPWindow.j b/AppKit/CPWindow/CPWindow.j
index 9fa4ffd69..01bf60f10 100644
--- a/AppKit/CPWindow/CPWindow.j
+++ b/AppKit/CPWindow/CPWindow.j
@@ -1673,11 +1673,29 @@ CPTexturedBackgroundWindowMask
                                             [self selectPreviousKeyView:self];
                                         else
                                             [self selectNextKeyView:self];
-
+#if PLATFORM(DOM)
+                                        // Make sure the browser doesn't try to do its own tab handling.
+                                        // This is important or the browser might blur the shared text field or token field input field,
+                                        // even that we just moved it to a new first responder.
+                                        [[[anEvent window] platformWindow] _propagateCurrentDOMEvent:NO]
+#endif
                                         return;
                                     }
                                     else if ([anEvent charactersIgnoringModifiers] === CPBackTabCharacter)
-                                        return [self selectPreviousKeyView:self];
+                                    {
+                                        var didTabBack = [self selectPreviousKeyView:self];
+                                        if (didTabBack)
+                                        {
+#if PLATFORM(DOM)
+                                            // Make sure the browser doesn't try to do its own tab handling.
+                                            // This is important or the browser might blur the shared text field or token field input field,
+                                            // even that we just moved it to a new first responder.
+                                            [[[anEvent window] platformWindow] _propagateCurrentDOMEvent:NO]
+#endif
+                                        }
+
+                                        return didTabBack;
+                                    }
 
                                     [[self firstResponder] keyDown:anEvent];