This website has a favicon:
link rel="shortcut icon" href="http://www.pathfolios.com/sites/default/files/Untitled-1%20copy%20%281%29.png" type="image/png"
The favicon appears normally when accessing pages within the site.
When using admin pages and particularly "viewing source" the icon becomes a stock icon of the server host. It happens on other computers as well.
Is it as simple as putting my icon file as favicon.ico?
I really want to know why if possible.