--- a/browser/base/content/browser-places.js
+++ b/browser/base/content/browser-places.js
@@ -734,18 +734,16 @@ HistoryMenu.prototype = {
     if (!menuitem)
       return;
 
     if (!PlacesUIUtils.shouldShowTabsFromOtherComputersMenuitem()) {
       menuitem.setAttribute("hidden", true);
       return;
     }
 
-    let enabled = PlacesUIUtils.shouldEnableTabsFromOtherComputersMenuitem();
-    menuitem.setAttribute("disabled", !enabled);
     menuitem.setAttribute("hidden", false);
   },
 
   _onPopupShowing: function HM__onPopupShowing(aEvent) {
     PlacesMenu.prototype._onPopupShowing.apply(this, arguments);
 
     // Don't handle events for submenus.
     if (aEvent.target != aEvent.currentTarget)