Here’s a piece of code that should really be unnecessary when you put the favico.ico into the root of your website directory:
<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
The favico.ico should automatically appear there and in your browser bookmarks (favourites in IE) but there are occasions when the above has to sit in the header section of your web pages. I know because I am doing it for this blog.
[...] I recently posted about using mod_rewrite to block access to your images from all but the websites to which you want access to be available. Following so doing, I discovered that my FAVICON had disappeared from Firefox’s address. As it turned out, it was easy to fix and that is covered in another recent post. [...]