diff --git a/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml b/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
index cd106fd5bb..8c6b6f4cb7 100755
--- a/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
+++ b/indra/newview/skins/default/xui/en/panel_preferences_advanced.xml
@@ -57,6 +57,34 @@
      name="show_develop_menu_check"
      top_pad="5"
      width="237"/>
+
+    <text
+     name="BackgroundYieldTimeText"
+     follows="top|left"
+     layout="topleft"
+     left="30"
+     right="-1"
+     word_wrap="true"
+     top_pad="30"
+     height="100">
+        Amount of time, in milliseconds, to yield every frame to other applications when Firestorm is not the foreground window (default: 40; 1 second = 1000 milliseconds):
+    </text>
+    <slider
+     can_edit_text="true"
+     control_name="BackgroundYieldTime"
+     decimal_digits="0"
+     follows="top|left"
+     layout="topleft"
+     height="15"
+     increment="10"
+     initial_value="40"
+     left="30"
+     max_val="1000"
+     min_val="0"
+     name="BackgroundYieldTime"
+     top_delta="40"
+     width="250" />
+
     <button
      top="40"
      enabled="true"
diff --git a/indra/newview/skins/default/xui/pl/panel_preferences_advanced.xml b/indra/newview/skins/default/xui/pl/panel_preferences_advanced.xml
index 3b47cd8610..fee6e67260 100755
--- a/indra/newview/skins/default/xui/pl/panel_preferences_advanced.xml
+++ b/indra/newview/skins/default/xui/pl/panel_preferences_advanced.xml
@@ -10,5 +10,8 @@
 	<check_box label="Zezwól na logowanie do innych siatek (nie wszystkie będą obsługiwać Firestorma)" name="show_grid_selection_check"/>
 	<check_box label="Pokaż menu Zaawansowane (na własną odpowiedzialność!)" name="show_advanced_menu_check"/>
 	<check_box label="Pokaż menu Programista" name="show_develop_menu_check"/>
+	<text name="BackgroundYieldTimeText">
+		Ilość czasu, w milisekundach, jaką Firestorm ma odstępować innym aplikacjom, gdy nie jest na pierwszym planie (domyślnie: 40; 1 sekunda = 1000 milisekund):
+	</text>
 	<button label="Resetuj wszystkie ustawienia" label_selected="Resetuj wszystkie ustawienia..." name="clear_settings"/>
 </panel>