diff --git a/mindplot/src/main/javascript/DesignerKeyboard.js b/mindplot/src/main/javascript/DesignerKeyboard.js
index c66f9fbf..e0b12a3f 100644
--- a/mindplot/src/main/javascript/DesignerKeyboard.js
+++ b/mindplot/src/main/javascript/DesignerKeyboard.js
@@ -256,13 +256,23 @@ mindplot.DesignerKeyboard = new Class({
                 event.stopPropagation();
             }
         );
-
+        var excludes = ['esc', 'f1', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8', 'f9', 'f10', 'f11', 'f12'];
+        
         $(document).on('keypress', function (event) {
-
-            var keyCode = event.keyCode;
+            var keyCode;
+            // Firefox doesn't skip special keys for keypress event...
+            if (event.key && excludes.contains(event.key.toLowerCase())) {
+                return;
+            }
+            // Sometimes Firefox doesn't contain keyCode value
+            if (event.key && event.keyCode == 0) {
+                keyCode = event.charCode;
+            } else {
+                keyCode = event.keyCode;
+            }
 
             var specialKey = jQuery.hotkeys.specialKeys[keyCode];
-            if (["enter", "capslock"].indexOf(specialKey) == -1 && !jQuery.hotkeys.shiftNums[keyCode] && keyCode != 91 /*win key*/) {
+            if (["enter", "capslock"].indexOf(specialKey) == -1 && !jQuery.hotkeys.shiftNums[keyCode]) {
                 var nodes = designer.getModel().filterSelectedTopics();
                 if (nodes.length > 0) {
 
@@ -379,3 +389,14 @@ mindplot.DesignerKeyboard = new Class({
     }
 
 });
+
+mindplot.DesignerKeyboard.specialKeys = {
+    8: "backspace", 9: "tab", 10: "return", 13: "enter", 16: "shift", 17: "ctrl", 18: "alt", 19: "pause",
+    20: "capslock", 27: "esc", 32: "space", 33: "pageup", 34: "pagedown", 35: "end", 36: "home",
+    37: "left", 38: "up", 39: "right", 40: "down", 45: "insert", 46: "del",
+    96: "0", 97: "1", 98: "2", 99: "3", 100: "4", 101: "5", 102: "6", 103: "7",
+    104: "8", 105: "9", 106: "*", 107: "+", 109: "-", 110: ".", 111 : "/",
+    112: "f1", 113: "f2", 114: "f3", 115: "f4", 116: "f5", 117: "f6", 118: "f7", 119: "f8",
+    120: "f9", 121: "f10", 122: "f11", 123: "f12", 144: "numlock", 145: "scroll", 186: ";", 191: "/",
+    220: "\\", 222: "'", 224: "meta"
+};
\ No newline at end of file