WebBrowser

Edit

The WebBrowser plugin provides cross platform support for showing web pages using the external web browser using:

private void MySampleCommand()
{
    PluginLoader.Instance.EnsureLoaded();
    var task = Mvx.IoCProvider.Resolve<IMvxWebBrowserTask>();
    task.ShowWebPage("http://www.xamarin.com");
}

This plugin is available on all of Android, iOS and Windows Uwp.