diff --git a/README.md b/README.md
index 393a69d..054d277 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,8 @@ Razer Pro Click V2 (vendor 5426, product 209)의 휠 좌우 틸트를 각각 `Co
 
 마우스 휠의 세로 스크롤 방향도 반전합니다. 트랙패드와 Magic Mouse처럼 제스처로 스크롤하는 장치와 가로 스크롤은 바꾸지 않습니다.
 
+틸트할 때 함께 들어오는 원래 버튼 이벤트(4~7번 버튼, 틸트 직후의 휠 클릭)는 막습니다. 측면 버튼도 4·5번 버튼이라 원래 동작 대신 뒤로/앞으로 가기로 동작합니다.
+
 ## 설치 / 업데이트
 
 ```sh
diff --git a/razer-tilt.swift b/razer-tilt.swift
index e912eef..8f652a8 100644
--- a/razer-tilt.swift
+++ b/razer-tilt.swift
@@ -151,6 +151,39 @@ let accessTimer: Timer? = accessGranted() ? nil : {
 // Invert vertical mouse-wheel scrolling. Trackpads and Magic Mouse send gesture phases;
 // wheels do not, even when their high-resolution scrolling is marked continuous.
 var scrollTap: CFMachPort?
+// Mouse buttons whose down event was swallowed, so the matching drag/up is swallowed too.
+var suppressedButtons = Set<Int64>()
+// CG button numbers (0-based) of the tilt bits 0x08/0x10/0x20/0x40, i.e. buttons 4-7.
+let tiltButtonNumbers: ClosedRange<Int64> = 3...6
+let middleButtonNumber: Int64 = 2
+// A wheel click this close to a tilt is the wheel being pressed while it is pushed sideways.
+let tiltClickWindow: TimeInterval = 0.15
+
+func tiltActive() -> Bool {
+    if state.lastBits.values.contains(where: { $0 != 0 }) { return true }
+    let now = ProcessInfo.processInfo.systemUptime
+    return state.lastFired.values.contains { now - $0 < tiltClickWindow }
+}
+
+// Swallow the native button events behind a tilt: many apps treat buttons 4-7 like a
+// middle click (e.g. open link in new tab), and tilting can also press the wheel button.
+func shouldSuppress(_ type: CGEventType, _ event: CGEvent) -> Bool {
+    let button = event.getIntegerValueField(.mouseEventButtonNumber)
+    switch type {
+    case .otherMouseDown:
+        if tiltButtonNumbers.contains(button) || (button == middleButtonNumber && tiltActive()) {
+            suppressedButtons.insert(button)
+            return true
+        }
+        return false
+    case .otherMouseDragged:
+        return suppressedButtons.contains(button)
+    case .otherMouseUp:
+        return suppressedButtons.remove(button) != nil
+    default:
+        return false
+    }
+}
 // Marks the replacement events this app posts so the tap lets them through untouched.
 let invertedScrollMarker: Int64 = 0x52544D31
 let scrollCallback: CGEventTapCallBack = { proxy, type, event, _ in
@@ -158,6 +191,7 @@ let scrollCallback: CGEventTapCallBack = { proxy, type, event, _ in
         if let tap = scrollTap { CGEvent.tapEnable(tap: tap, enable: true) }
         return Unmanaged.passUnretained(event)
     }
+    if shouldSuppress(type, event) { return nil }
     guard type == .scrollWheel,
           event.getIntegerValueField(.eventSourceUserData) != invertedScrollMarker
     else { return Unmanaged.passUnretained(event) }
@@ -189,7 +223,8 @@ let scrollCallback: CGEventTapCallBack = { proxy, type, event, _ in
 }
 if accessGranted() {
     scrollTap = CGEvent.tapCreate(tap: .cgSessionEventTap, place: .headInsertEventTap, options: .defaultTap,
-                                  eventsOfInterest: CGEventMask(1 << CGEventType.scrollWheel.rawValue),
+                                  eventsOfInterest: [CGEventType.scrollWheel, .otherMouseDown, .otherMouseDragged, .otherMouseUp]
+                                      .reduce(CGEventMask(0)) { $0 | CGEventMask(1 << $1.rawValue) },
                                   callback: scrollCallback, userInfo: nil)
     if let tap = scrollTap {
         CFRunLoopAddSource(CFRunLoopGetCurrent(), CFMachPortCreateRunLoopSource(kCFAllocatorDefault, tap, 0), .commonModes)