I used that about:config tweak Gary linked to, and I still don't see the favicon in SeaMonkey. ![unsure :unsure:](https://twctodayforums.com/forums/Smileys/1/unsure.gif)
That's weird. Try clearing your cache, and if that doesn't work, restart SeaMonkey (although you shouldn't have to - all I needed to do is after I did the tweak, reload the page).