Only reload the popover in Safari, when itself is shown for a different tab

safari/ext/popup.js

 (function()
 {
   // Safari will load the popover once, and then show it everytime the icon is
   // clicked. While Chrome loads it everytime you click the icon. So in order to
-  // force the same behavior in Safari, we are going to reload the page of the
-  // bubble everytime it is shown.
-  safari.application.addEventListener("popover", function()
+  // make the popover show the right state and details we have to reload it
+  // everytime it is shown for a different tab. Also we have to reload the
+  // popover when the background page wasn't ready yet, since we have to access
+  // the background page in the popover.
+  var backgroundPage = safari.extension.globalPage.contentWindow;
+  var readyState = backgroundPage.document.readyState;
+  var activeTab = safari.application.activeBrowserWindow.activeTab;
+
+  safari.self.addEventListener("popover", function()
   {
-    document.documentElement.style.display = "none";
-    document.location.reload();
-  }, true);
+    if (activeTab != safari.application.activeBrowserWindow.activeTab || readyState != "complete")
+    {
+      document.documentElement.style.display = "none";
+      document.location.reload();
+    }
+  });
 
 
   // Safari doesn't adjust the size of the popover automatically to the size
   // of its content, like when the ad counter is expanded/collapsed. So we add
   // event listeners to do so.
   var updateSize = function()
   {
     safari.self.width = document.body.offsetWidth;
     safari.self.height = document.body.offsetHeight;
   };
@@ skipping 17 matching lines @@
   // listener to do so.
   safari.application.addEventListener("activate", function()
   {
     safari.self.hide();
   }, true);
 
 
   // import ext into the javascript context of the popover. This code might fail,
   // when the background page isn't ready yet. So it is important to put it below
   // the reloading code above.
-  var backgroundPage = safari.extension.globalPage.contentWindow;
   ext = backgroundPage.ext;
   TabMap = backgroundPage.TabMap;
 })();