diff --git a/.config/browser/userjs/zen-user.js b/.config/browser/userjs/zen-user.js
new file mode 100644
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--- /dev/null
+++ b/.config/browser/userjs/zen-user.js
@@ -0,0 +1,68 @@
+/****************************************************************************************
+ * Smoothfox                                                                            *
+ * "Faber est suae quisque fortunae"                                                    *
+ * priority: better scrolling                                                           *
+ * version: 126.1                                                                       *
+ * url: https://github.com/yokoffing/Betterfox                                          *
+ ***************************************************************************************/
+
+// Use only one option at a time!
+// Reset prefs if you decide to use different option.
+
+/****************************************************************************************
+ * OPTION: SHARPEN SCROLLING                                                           *
+ ****************************************************************************************/
+// credit: https://github.com/black7375/Firefox-UI-Fix
+// only sharpen scrolling
+// user_pref("apz.overscroll.enabled", true); // DEFAULT NON-LINUX
+// user_pref("general.smoothScroll", true); // DEFAULT
+// user_pref("mousewheel.min_line_scroll_amount", 10); // 10-40; adjust this number to your liking; default=5
+// user_pref("general.smoothScroll.mouseWheel.durationMinMS", 80); // default=50
+// user_pref("general.smoothScroll.currentVelocityWeighting", "0.15"); // default=.25
+// user_pref("general.smoothScroll.stopDecelerationWeighting", "0.6"); // default=.4
+// Firefox Nightly only:
+// [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1846935
+// user_pref("general.smoothScroll.msdPhysics.enabled", false); // [FF122+ Nightly]
+
+/****************************************************************************************
+ * OPTION: INSTANT SCROLLING (SIMPLE ADJUSTMENT)                                       *
+ ****************************************************************************************/
+// recommended for 60hz+ displays
+// user_pref("apz.overscroll.enabled", true); // DEFAULT NON-LINUX
+// user_pref("general.smoothScroll", true); // DEFAULT
+// user_pref("mousewheel.default.delta_multiplier_y", 275); // 250-400; adjust this number to your liking
+// // Firefox Nightly only:
+// // [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1846935
+// user_pref("general.smoothScroll.msdPhysics.enabled", false); // [FF122+ Nightly]
+
+/****************************************************************************************
+ * OPTION: SMOOTH SCROLLING                                                            *
+ ****************************************************************************************/
+// recommended for 90hz+ displays
+user_pref("apz.overscroll.enabled", true); // DEFAULT NON-LINUX
+user_pref("general.smoothScroll", true); // DEFAULT
+user_pref("general.smoothScroll.msdPhysics.enabled", true);
+user_pref("mousewheel.default.delta_multiplier_y", 250); // 250-400; adjust this number to your liking
+
+/****************************************************************************************
+ * OPTION: NATURAL SMOOTH SCROLLING V3 [MODIFIED]                                      *
+ ****************************************************************************************/
+// credit: https://github.com/AveYo/fox/blob/cf56d1194f4e5958169f9cf335cd175daa48d349/Natural%20Smooth%20Scrolling%20for%20user.js
+// recommended for 120hz+ displays
+// largely matches Chrome flags: Windows Scrolling Personality and Smooth Scrolling
+// user_pref("apz.overscroll.enabled", true); // DEFAULT NON-LINUX
+// user_pref("general.smoothScroll", true); // DEFAULT
+// user_pref("general.smoothScroll.msdPhysics.continuousMotionMaxDeltaMS", 12);
+// user_pref("general.smoothScroll.msdPhysics.enabled", true);
+// 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.slowdownMinDeltaRatio", "2");
+// user_pref("general.smoothScroll.msdPhysics.slowdownSpringConstant", 250);
+// user_pref("general.smoothScroll.currentVelocityWeighting", "1");
+// user_pref("general.smoothScroll.stopDecelerationWeighting", "1");
+// user_pref("mousewheel.default.delta_multiplier_y", 300); // 250-400; adjust this number to your liking
+
+// Custom Options
+user_pref("ui.key.menuAccessKey", 0);
+user_pref("toolkit.tabbox.switchByScrolling", true);