closes #1973

src/widget/loginscreen.cpp

@@ -36,6 +36,10 @@ LoginScreen::LoginScreen(QWidget *parent) :
 {
     ui->setupUi(this);
 
+    // permanently disables maximize button https://github.com/tux3/qTox/issues/1973
+    this->setWindowFlags(windowFlags() ^ Qt::WindowMaximizeButtonHint);
+    this->setFixedSize(this->size());
+
     connect(&quitShortcut, &QShortcut::activated, this, &LoginScreen::close);
     connect(ui->newProfilePgbtn, &QPushButton::clicked, this, &LoginScreen::onNewProfilePageClicked);
     connect(ui->loginPgbtn, &QPushButton::clicked, this, &LoginScreen::onLoginPageClicked);