Do you need a Facebook Icon or just a shortcut to open your default browser to Facebook?
To create a shortcut on the desktop to Facebook is easy. Simply right-click on the Desktop and select New > Shortcut. For the location simply put in
https://www.facebook.com/ (If you want it to go to her specific Facebook page then paste in that URL instead) and hit next. Then give the shortcut a name like
Facebook. Click Finish.
But I don't know how to assign it a facebook icon, it will simply have an icon that looks like your default browser.