remember is window was maximised before fullscreen

src/mainwindow.cpp

@@ -36,7 +36,12 @@ void MainWindow::setupWebView() {
 void MainWindow::fullScreenRequested(
     QWebEngineFullScreenRequest fullScreenRequest) {
   fullScreenRequest.accept();
-  fullScreenRequest.toggleOn() ? showFullScreen() : showNormal();
+  if (fullScreenRequest.toggleOn()) {
+    m_wasMaximized = isMaximized();
+    showFullScreen();
+  } else {
+    m_wasMaximized ? showMaximized() : showNormal();
+  }
 }
 
 void MainWindow::closeEvent(QCloseEvent *event) { QApplication::quit(); }

src/mainwindow.h

@@ -22,6 +22,7 @@ private:
   QWebEngineProfile *prepareProfile();
   DiscordPage *m_discordPage;
   void closeEvent(QCloseEvent *event) override;
+  bool m_wasMaximized;
 
 private Q_SLOTS:
   void fullScreenRequested(QWebEngineFullScreenRequest fullScreenRequest);