Favicon Won't Show On Firefox

Hello,

I’ve been updating my website’s favicon from a pink checkerboard to a mustache. The mustache is showing up on Chrome, but on Firefox, it will appear in my dashboard but not on the actual site. I’ve deleted my cache and updated and restarted Firefox, but nothing has worked so far. Any ideas for getting it to show?

Thank you,

Grace

http://wordpress.org/extend/plugins/all-in-one-favicon/