Hi!    If question still relevant , try: procedure TMainForm.UniButton1Click(Sender: TObject); begin   if MainModule.UniMainModule.BrowserOptions = [] then begin     MainModule.UniMainModule.BrowserOptions := [boDisableMouseRightClick];     UniSession.AddJS('document.oncontextmenu = document.body.oncontextmenu = function () { return false; }');   end   else begin     MainModule.UniMainModule.BrowserOptions := [];     UniSession.AddJS('document.oncontextmenu = document.body.oncontextmenu = fu
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