diff --git a/mozilla/modules/libpref/src/init/all.js b/mozilla/modules/libpref/src/init/all.js
index bdbfabf8007..ddae492d9e2 100644
--- a/mozilla/modules/libpref/src/init/all.js
+++ b/mozilla/modules/libpref/src/init/all.js
@@ -150,6 +150,9 @@ pref("nglayout.events.showHierarchicalHover", false);
 // whether or not to use xbl form controls
 pref("nglayout.debug.enable_xbl_forms", false);
 
+// size of scrollbar snapping region
+pref("slider.snapMultiplier", 6);
+
 // Smart Browsing prefs
 pref("browser.related.enabled", true);
 pref("browser.related.autoload", 1);  // 0 = Always, 1 = After first use, 2 = Never