Ticket #5450: 5450_2.patch

_source/plugins/dialogui/plugin.js

@@ -509 +509 @@
                                                                 {
                                                                         if ( evt.data.getKeystroke() in { 32:1, 13:1 } )
                                                                         {
+                                                                                // if the event target is a link and is focused
+                                                                                // do not prevent the default behavior, then it will fire click event
+                                                                                // why we do this is that in this case FireFox couldn't prevent default behavior successfully (#5450)
+                                                                                var target = evt.data.getTarget();
+                                                                                if ( target.getName() == 'a' ) 
+                                                                                        return;
+                                                                                
                                                                                 me.click();
                                                                                 evt.data.preventDefault();
                                                                         }