diff --git a/mobile/chrome/content/InputHandler.js b/mobile/chrome/content/InputHandler.js
index 51cd01aa1b81..6bb6025817a0 100644
--- a/mobile/chrome/content/InputHandler.js
+++ b/mobile/chrome/content/InputHandler.js
@@ -374,6 +374,14 @@ InputHandler.EventInfo.prototype = {
  *   dragMove(dx, dy, scroller)
  *     Signals an input attempt to drag by dx, dy.
  *
+ * Optionally, a custom dragger may define a boolean property
+ *
+ *   allowRealtimeDownUp
+ *
+ * that, when true, will prevent the mousedown and mouseup events corresponding
+ * to the beginning and end of a drag from being swallowed (propagation stopped
+ * and default prevented) by the MouseModule.
+ *
  * Between mousedown and mouseup, MouseModule incrementally drags and updates
  * the dragger accordingly, and also determines whether a [double-]click occured
  * (based on whether the input moves have moved outside of a certain drag disk
@@ -473,8 +481,10 @@ MouseModule.prototype = {
                                             : null;
     this._clicker = (targetClicker) ? targetClicker.customClicker : null;
 
-    evInfo.event.stopPropagation();
-    evInfo.event.preventDefault();
+    if (this._dragger && !this._dragger.allowRealtimeDownUp) {
+      evInfo.event.stopPropagation();
+      evInfo.event.preventDefault();
+    }
 
     this._owner.grab(this);
 
@@ -497,19 +507,21 @@ MouseModule.prototype = {
   _onMouseUp: function _onMouseUp(evInfo) {
     let dragData = this._dragData;
 
-    evInfo.event.stopPropagation();
-    evInfo.event.preventDefault();
+    if (this._dragger && !this._dragger.allowRealtimeDownUp) {
+      evInfo.event.stopPropagation();
+      evInfo.event.preventDefault();
 
-    // we are swallowing mousedown and mouseup, so we should swallow their
-    // potential corresponding click, too
-    this._owner.suppressNextClick();
+      // we have swallowed mousedown and mouseup, so we should swallow their
+      // potential corresponding click, too
+      this._owner.suppressNextClick();
+    }
 
     let [sX, sY] = [evInfo.event.screenX, evInfo.event.screenY];
 
     let movedOutOfRadius = dragData.isPointOutsideRadius(sX, sY);
 
-    if (dragData.dragging)
-      this._doDragStop(sX, sY);
+    if (dragData.dragging)       // XXX same check as this._dragger but we
+      this._doDragStop(sX, sY);  //  are using both, no good reason
 
     this._recordEvent(evInfo);
 
@@ -558,6 +570,10 @@ MouseModule.prototype = {
     this._owner.startListening();
   },
 
+  _skipAllDownUpEvents: function _skipAllDownUpEvents() {
+    this._downUpDispatchedIndex = this._downUpEvents.length;
+  },
+
   /**
    * Helper function to _redispatchDownUpEvents() that sends a single DOM mouse
    * event to the Fennec global chrome window.
@@ -662,12 +678,17 @@ MouseModule.prototype = {
    */
   _doClick: function _doClick(movedOutOfRadius) {
     let commitToClicker = this._clicker && !movedOutOfRadius;
+    let needToRedispatch = this._dragger && !this._dragger.allowRealtimeDownUp && !movedOutOfRadius;
 
     if (commitToClicker) {
       this._commitAnotherClick();  // commit this click to the doubleclick timewait buffer
     }
 
-    this._redispatchDownUpEvents();
+    if (needToRedispatch) {
+      this._redispatchDownUpEvents();
+    } else {
+      this._skipAllDownUpEvents();
+    }
 
     if (!commitToClicker) {
       this._cleanClickBuffer();    // clean the click buffer ourselves, since there was no clicker
diff --git a/mobile/chrome/content/browser-ui.js b/mobile/chrome/content/browser-ui.js
index c08c3b1832f3..0f2fa2784fe4 100644
--- a/mobile/chrome/content/browser-ui.js
+++ b/mobile/chrome/content/browser-ui.js
@@ -884,7 +884,7 @@ var SelectHelper = {
     this._list.setAttribute("multiple", this._control.multiple ? "true" : "false");
 
     let firstSelected = null;
-    
+
     let optionIndex = 0;
     let children = this._control.children;
     for (let i=0; i<children.length; i++) {
@@ -940,10 +940,10 @@ var SelectHelper = {
           index = aIndex;
       }
     );
-    
+
     if (index == -1)
       return;
-    
+
     let itemHeight = aElement.getBoundingClientRect().height;
     let visibleItemsCount = this._list.boxObject.height / itemHeight;
     if ((index + 1) > visibleItemsCount) {
diff --git a/mobile/chrome/content/browser.js b/mobile/chrome/content/browser.js
index 9947daefc0a4..3d977fc9a9fe 100644
--- a/mobile/chrome/content/browser.js
+++ b/mobile/chrome/content/browser.js
@@ -353,6 +353,7 @@ var Browser = {
     let controlsScrollbox = this.controlsScrollbox = document.getElementById("scrollbox");
     this.controlsScrollboxScroller = controlsScrollbox.boxObject.QueryInterface(Ci.nsIScrollBoxObject);
     controlsScrollbox.customDragger = {
+      allowRealtimeDownUp: true,
       dragStart: function dragStart(cx, cy, target, scroller) {},
       dragStop: function dragStop(dx, dy, scroller) { return false; },
       dragMove: function dragMove(dx, dy, scroller) { return false; }
@@ -1241,6 +1242,8 @@ var Browser = {
 };
 
 Browser.MainDragger = function MainDragger(browserView) {
+  this.allowRealtimeDownUp = true;
+
   this.scrollingOuterX = true;
   this.bv = browserView;
   this.floatedWhileDragging = false;
@@ -1847,7 +1850,7 @@ const gPopupBlockerObserver = {
     gPrefService.setBoolPref("privacy.popups.showBrowserMessage", !showMessage);
     Browser.getNotificationBox().removeCurrentNotification();
   },
-  
+
   showPopupsForSite: function showPopupsForSite() {
     let uri = Browser.selectedBrowser.currentURI;
     let pageReport = Browser.selectedBrowser.pageReport;
@@ -1863,10 +1866,10 @@ const gPopupBlockerObserver = {
         if (popupURIspec == "" || popupURIspec == "about:blank" ||
             popupURIspec == uri.spec)
           continue;
-        
+
         let popupFeatures = pageReport[i].popupWindowFeatures;
         let popupName = pageReport[i].popupWindowName;
-        
+
         Browser.addTab(popupURIspec, false);
       }
     }