--- a/WebBrowser/WebBrowserPage.py	Tue Apr 10 19:43:45 2018 +0200
+++ b/WebBrowser/WebBrowserPage.py	Wed Apr 11 19:57:23 2018 +0200
@@ -153,6 +153,7 @@
             if threatLists:
                 threatMessages = WebBrowserWindow.safeBrowsingManager()\
                     .getThreatMessages(threatLists)
+                # TODO: handle threatLists being None (indicating a lookup error)
                 res = E5MessageBox.warning(
                     WebBrowserWindow.getWindow(),
                     self.tr("Suspicuous URL detected"),