In Firefox 38.0.5 my site (www.vocidangeli.nl) does not display with wp-slimstat enabled. Firebug reports a 500 server error. With the plugin disabled the site works fine. Also, other browsers (Chrome, IE, Safari) have no problem with the plugin enabled. Even Firefox 37 renders the site ok.
Analysis of the problem in Firefox can be seen at https://bugzilla.mozilla.org/show_bug.cgi?id=1174891
What can be the cause of the server error in this specific browser/version?
Regards,
Paul