Only handle click actions for left & middle buttons

chrome/browser/resources/ntp4/new_tab.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview New tab page 4
  * This is the main code for a previous version of the Chrome NTP ("NTP4").
  * Some parts of this are still used for the chrome://apps page.
  */
 
@@ skipping 142 matching lines @@
       startTime = Date.now();
     });
   }
 
   /**
    * Launches the chrome web store app with the chrome-ntp-launcher
    * source.
    * @param {Event} e The click/auxclick event.
    */
   function onChromeWebStoreButtonClick(e) {
+    if (e.button > 1)
+      return; // Ignore buttons other than left and middle.
     chrome.send('recordAppLaunchByURL',
                 [encodeURIComponent(this.href),
                  ntp.APP_LAUNCH.NTP_WEBSTORE_FOOTER]);
   }
 
   /**
    * The number of sections to wait on.
    * @type {number}
    */
   var sectionsToWaitFor = -1;
@@ skipping 275 matching lines @@
     setBookmarkBarAttached: setBookmarkBarAttached,
     setFaviconDominantColor: setFaviconDominantColor,
     themeChanged: themeChanged,
     updateLogin: updateLogin
   };
 });
 
 document.addEventListener('DOMContentLoaded', ntp.onLoad);
 
 var toCssPx = cr.ui.toCssPx;