Redirect loop on GMail when disabling third-party cookies

diff --git a/examples/webenginewidgets/simplebrowser/browser.cpp b/examples/webenginewidgets/simplebrowser/browser.cpp
index 5c6dbd35..f516bf15 100644
--- a/examples/webenginewidgets/simplebrowser/browser.cpp
+++ b/examples/webenginewidgets/simplebrowser/browser.cpp
@@ -52,6 +52,7 @@
 #include "browserwindow.h"
 
 #include <QWebEngineProfile>
+#include <QWebEngineCookieStore>
 
 Browser::Browser()
 {
@@ -64,6 +65,9 @@ Browser::Browser()
     QObject::connect(
         &m_otrProfile, &QWebEngineProfile::downloadRequested,
         &m_downloadManagerWidget, &DownloadManagerWidget::downloadRequested);
+
+    QWebEngineProfile::defaultProfile()->cookieStore()->setCookieFilter(
+        [](const QWebEngineCookieStore::FilterRequest &request) { return !request.thirdParty; });
 }
 
 BrowserWindow *Browser::createWindow(bool offTheRecord)