diff --git a/src/calibre/gui2/tweak_book/preview.py b/src/calibre/gui2/tweak_book/preview.py
index 244a4217b8..d1daa71c32 100644
--- a/src/calibre/gui2/tweak_book/preview.py
+++ b/src/calibre/gui2/tweak_book/preview.py
@@ -300,6 +300,18 @@ class WebPage(QWebPage):
 
     def __init__(self, parent):
         QWebPage.__init__(self, parent)
+        settings = self.settings()
+        apply_settings(settings, config().parse())
+        settings.setMaximumPagesInCache(0)
+        settings.setAttribute(settings.JavaEnabled, False)
+        settings.setAttribute(settings.PluginsEnabled, False)
+        settings.setAttribute(settings.PrivateBrowsingEnabled, True)
+        settings.setAttribute(settings.JavascriptCanOpenWindows, False)
+        settings.setAttribute(settings.JavascriptCanAccessClipboard, False)
+        settings.setAttribute(settings.LinksIncludedInFocusChain, False)
+        settings.setAttribute(settings.DeveloperExtrasEnabled, True)
+        settings.setDefaultTextEncoding('utf-8')
+
         self.setNetworkAccessManager(NetworkAccessManager(self))
         self.setLinkDelegationPolicy(self.DelegateAllLinks)
         self.mainFrame().javaScriptWindowObjectCleared.connect(self.init_javascript)
@@ -346,19 +358,9 @@ class WebView(QWebView):
         self.inspector = QWebInspector(self)
         w = QApplication.instance().desktop().availableGeometry(self).width()
         self._size_hint = QSize(int(w/3), int(w/2))
-        settings = self.page().settings()
-        apply_settings(settings, config().parse())
-        settings.setMaximumPagesInCache(0)
-        settings.setAttribute(settings.JavaEnabled, False)
-        settings.setAttribute(settings.PluginsEnabled, False)
-        settings.setAttribute(settings.PrivateBrowsingEnabled, True)
-        settings.setAttribute(settings.JavascriptCanOpenWindows, False)
-        settings.setAttribute(settings.JavascriptCanAccessClipboard, False)
-        settings.setAttribute(settings.LinksIncludedInFocusChain, False)
-        settings.setAttribute(settings.DeveloperExtrasEnabled, True)
-        settings.setDefaultTextEncoding('utf-8')
         self._page = WebPage(self)
         self.setPage(self._page)
+        self.inspector.setPage(self._page)
         self.clear()
 
     def sizeHint(self):