favicon not displayed by Firefox

Answer 1

was facing similar issue. Just break the cache of image. I am using MVC Razor View.

    var link = document.createElement('link');
    link.type = 'image/x-icon';
    link.rel = 'shortcut icon';
    link.href = "/images/favicon.ico?t=@DateTime.Now.Ticks";
    var head = document.head || document.getElementsByTagName('head')[0];
    head.appendChild(link);