--- a/mobile/android/base/gfx/JavaPanZoomController.java
+++ b/mobile/android/base/gfx/JavaPanZoomController.java
@@ -64,16 +64,19 @@ class JavaPanZoomController
     private static final float MAX_ZOOM = 4.0f;
 
     // The maximum amount we would like to scroll with the mouse
     private static final float MAX_SCROLL = 0.075f * GeckoAppShell.getDpi();
 
     // The maximum zoom factor adjustment per frame of the AUTONAV animation
     private static final float MAX_ZOOM_DELTA = 0.125f;
 
+    // Length of the bounce animation in ms
+    private static final int BOUNCE_ANIMATION_DURATION = 250;
+
     private enum PanZoomState {
         NOTHING,        /* no touch-start events received */
         FLING,          /* all touches removed, but we're still scrolling page */
         TOUCHING,       /* one touch-start event received */
         PANNING_LOCKED, /* touch-start followed by move (i.e. panning with axis lock) */
         PANNING,        /* panning without axis lock */
         PANNING_HOLD,   /* in panning, but not moving.
                          * similar to TOUCHING but after starting a pan */
@@ -803,31 +806,31 @@ class JavaPanZoomController
              * out.
              */
             if (!(mState == PanZoomState.BOUNCE || mState == PanZoomState.ANIMATED_ZOOM)) {
                 finishAnimation();
                 return;
             }
 
             /* Perform the next frame of the bounce-back animation. */
-            if (mBounceFrame < (int)(256f/Axis.MS_PER_FRAME)) {
+            if (mBounceFrame < (int)(BOUNCE_ANIMATION_DURATION / Axis.MS_PER_FRAME)) {
                 advanceBounce();
                 return;
             }
 
             /* Finally, if there's nothing else to do, complete the animation and go to sleep. */
             finishBounce();
             finishAnimation();
             setState(PanZoomState.NOTHING);
         }
 
         /* Performs one frame of a bounce animation. */
         private void advanceBounce() {
             synchronized (mTarget.getLock()) {
-                float t = easeOut(mBounceFrame * Axis.MS_PER_FRAME / 256f);
+                float t = easeOut(mBounceFrame * Axis.MS_PER_FRAME / BOUNCE_ANIMATION_DURATION);
                 ImmutableViewportMetrics newMetrics = mBounceStartMetrics.interpolate(mBounceEndMetrics, t);
                 mTarget.setViewportMetrics(newMetrics);
                 mBounceFrame++;
             }
         }
 
         /* Concludes a bounce animation and snaps the viewport into place. */
         private void finishBounce() {