diff --git a/Smoothfox.js b/Smoothfox.js
index d8b6ca7..cf05292 100644
--- a/Smoothfox.js
+++ b/Smoothfox.js
@@ -3,7 +3,7 @@
  * Smoothfox                                                                            *
  * "Faber est suae quisque fortunae"                                                    *
  * priority: better scrolling                                                           *
- * version: 137                                                                       *
+ * version: 152                                                                         *
  * url: https://github.com/yokoffing/Betterfox                                          *
  ***************************************************************************************/
 
@@ -45,6 +45,22 @@ user_pref("general.smoothScroll", true); // DEFAULT
 user_pref("general.smoothScroll.msdPhysics.enabled", true);
 user_pref("mousewheel.default.delta_multiplier_y", 300); // 250-400; adjust this number to your liking
 
+/****************************************************************************************
+ * OPTION: ZEN SMOOTH SCROLLING                                                         *
+****************************************************************************************/
+// recommended for 120hz+ displays
+user_pref("general.smoothScroll.msdPhysics.enabled", true);
+user_pref("general.smoothScroll.currentVelocityWeighting", "0.15");
+user_pref("general.smoothScroll.stopDecelerationWeighting", "0.6");
+user_pref("mousewheel.min_line_scroll_amount", 10);
+user_pref("general.smoothScroll.mouseWheel.durationMinMS", 80);
+user_pref("general.smoothScroll.msdPhysics.continuousMotionMaxDeltaMS", 12);
+user_pref("general.smoothScroll.msdPhysics.motionBeginSpringConstant", 600);
+user_pref("general.smoothScroll.msdPhysics.regularSpringConstant", 650);
+user_pref("general.smoothScroll.msdPhysics.slowdownMinDeltaMS", 25);
+user_pref("general.smoothScroll.msdPhysics.slowdownSpringConstant", 250);
+user_pref("mousewheel.default.delta_multiplier_y", 200);
+
 /****************************************************************************************
  * OPTION: NATURAL SMOOTH SCROLLING V3 [MODIFIED]                                      *
 ****************************************************************************************/