--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -45,17 +45,16 @@ Cu.import("resource://gre/modules/Notifi
   ["SimpleServiceDiscovery", "resource://gre/modules/SimpleServiceDiscovery.jsm"],
   ["SitePermissions", "resource:///modules/SitePermissions.jsm"],
   ["Social", "resource:///modules/Social.jsm"],
   ["TabCrashHandler", "resource:///modules/ContentCrashHandlers.jsm"],
   ["Task", "resource://gre/modules/Task.jsm"],
   ["TelemetryStopwatch", "resource://gre/modules/TelemetryStopwatch.jsm"],
   ["Translation", "resource:///modules/translation/Translation.jsm"],
   ["UITour", "resource:///modules/UITour.jsm"],
-  ["URLBarZoom", "resource:///modules/URLBarZoom.jsm"],
   ["UpdateUtils", "resource://gre/modules/UpdateUtils.jsm"],
   ["Weave", "resource://services-sync/main.js"],
   ["fxAccounts", "resource://gre/modules/FxAccounts.jsm"],
   ["gDevTools", "resource://devtools/client/framework/gDevTools.jsm"],
   ["gDevToolsBrowser", "resource://devtools/client/framework/gDevTools.jsm"],
   ["webrtcUI", "resource:///modules/webrtcUI.jsm", ]
 ].forEach(([name, resource]) => XPCOMUtils.defineLazyModuleGetter(this, name, resource));
 
@@ -4446,23 +4445,26 @@ var XULBrowserWindow = {
           location == "") {  // Second condition is for new tabs, otherwise
                              // reload function is enabled until tab is refreshed.
         this.reloadCommand.setAttribute("disabled", "true");
       } else {
         this.reloadCommand.removeAttribute("disabled");
       }
 
       URLBarSetURI(aLocationURI);
+
       BookmarkingUI.onLocationChange();
+
       gIdentityHandler.onLocationChange();
+
       SocialUI.updateState();
+
       UITour.onLocationChange(location);
+
       gTabletModePageCounter.inc();
-      ReaderParent.updateReaderButton(gBrowser.selectedBrowser);
-      URLBarZoom.updateZoomButton(gBrowser.selectedBrowser, "browser-fullZoom:location-change");
 
       // Utility functions for disabling find
       var shouldDisableFind = function shouldDisableFind(aDocument) {
         let docElt = aDocument.documentElement;
         return docElt && docElt.getAttribute("disablefastfind") == "true";
       }
 
       var disableFindCommands = function disableFindCommands(aDisable) {
@@ -4506,16 +4508,17 @@ var XULBrowserWindow = {
           gBrowser.selectedTab.hasAttribute("customizemode")) {
         gCustomizeMode.enter();
       } else if (CustomizationHandler.isEnteringCustomizeMode ||
                  CustomizationHandler.isCustomizing()) {
         gCustomizeMode.exit();
       }
     }
     UpdateBackForwardCommands(gBrowser.webNavigation);
+    ReaderParent.updateReaderButton(gBrowser.selectedBrowser);
 
     gGestureSupport.restoreRotationState();
 
     // See bug 358202, when tabs are switched during a drag operation,
     // timers don't fire on windows (bug 203573)
     if (aRequest)
       setTimeout(function () { XULBrowserWindow.asyncUpdateUI(); }, 0);
     else