https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.webbrowser.allownavigation?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0&redirectedfrom=MSDN
WebBrowser.AllowNavigation Property (System.Windows.Forms) | Microsoft Learn
Gets or sets a value indicating whether the control can navigate to another page after its initial page has been loaded.
property systemwindows formswebbrowsermicrosoftlearn