Our Oracle Enterprise Manager Grid Control 10.2.0.5 website has no favicon. I don't know if this is normal or not. If it is not normal I'll contact support, but if it is normal I'd like to know if there is a way to add one. I would guess if I knew where the root of the website was I could put a favicon.ico file there, but I'm not sure how to determine where the root of the site is in the file system.
The Enterprise Manager for Oracle Forms Application server doesn't have a favicon over at my installation either. The location to root of the site is
$oracle_home\Apache\Apache\htdocs
In my case, its
e:\Applsinfra\Apache\Apache\htdocs