I have set a custom favicon on a Force.com site, but it is only working on the public site. The secure site still displays the default Salesforce favicon.
<mycompany>.force.com/favicon.ico is the custom favicon, but <mycompany>.secure.force.com/favicon.ico is the standard SF favicon.
From this question in the SF discussion forums, I understand that the custom favicon should take affect in a secure site if the site has no path. Yet, it is not working in our case.
For now, I'm adding <link rel="icon" href="{!$Resource.Favicon}" /> to the site template. However, I would prefer to do it declaratively if possible.
Best Answer
We did this, and the favicon used by the site config page in salesforce works for both public and secure URLs...nothing extra to do there.
I didn't add the favicon on the site template.
I'd suggest giving it a few days. Is your site new, or just the favicon?