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Favicon.ico loading causes mixed content warning in Firefox in subsite

Home Forums Mixed content in my site Favicon.ico loading causes mixed content warning in Firefox in subsite

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  • #637606
    Blake Mackey

    Running Really Simple SSL pro multisite 4.1.9
    HTTPS enable on a per-site basis, and turned on.
    The mixed content fixer combined with the 301 redirects through .htaccess seem to be working except for one issue.

    When a client does not have a favicon saved, firefox browsers request one anyways.
    A 302 link is returned for the insecure ‘w-logo-blue-white-bg.png’
    Subsequently a 301 is returned for secure ‘w-logo-blue-white-bg.png’
    But it was enough to trip the HTTPS warning in Firefox.

    Any ideas?

    • This topic was modified 8 months, 3 weeks ago by Blake Mackey.
    Blake Mackey

    I’ve narrowed the issue down to concurrent use of a plugin called WP Ultimo v1.10.13.
    I use this plugin to manage my multisites.

    Ultimo has it’s own separate setting to turn on/off forcing HTTPS.

    If I disable Ultimo, everything works perfectly.
    If I enable Ultimo (but leave its ‘force https’ setting off), all links get redirected perfectly with the exception of the default favicon fallback issue I note initially.
    If I enable Ultimo (AND turn its ‘force https’ setting on), everything works perfectly.

    I would prefer to manage the HTTPS setting under one plugin completely, so what can I change to enable this in Really Simple SSL?


    Hi Blake,

    I don’t think there’s a downside of enabling the force https in Ultimo as well. If you want we can take a look at the favicon issue. To do so, please share your domain with us. You can do this by sending an email to support(at)


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