Bug 593787: Long click on any Bookmark in Bookmark Manager doesn't always popup context menu [r=mfinkle]

mobile/app/mobile.js

@@ -483,3 +483,7 @@ pref("network.buffer.cache.size",  16384);
 pref("services.sync.client.type", "mobile");
 pref("services.sync.registerEngines", "Tab,Bookmarks,Form,History,Password");
 pref("services.sync.autoconnectDelay", 5);
+
+// Drag thresholds
+pref("ui.dragThresholdX", 25);
+pref("ui.dragThresholdY", 25);

mobile/chrome/content/InputHandler.js

@@ -50,7 +50,7 @@ const kDoubleClickInterval = 400;
 const kDoubleClickThreshold = 200;
 
 // threshold in pixels for sensing a tap as opposed to a pan
-const kTapRadius = 25;
+const kTapRadius = Services.prefs.getIntPref("ui.dragThresholdX");
 
 // maximum drag distance in pixels while axis locking can still be reverted
 const kAxisLockRevertThreshold = 200;