Browsers.Item(btChrome).RunOptions = "--incognito"
Browsers.Item(btChrome).Navigate("https://www.google.com/");
Sys.Browser().BrowserWindow(0).Maximize();
Its not working.
Try,
function main()
{
Browsers.Item(btChrome).RunOptions = "-incognito www.w3schools.com";
Browsers.Item(btChrome).Run();
}