when I go back with the browser back button(Safari/Firefox) from my blog page or other url, i'm stuck with the preloader

Hi there, it’s most likely because back button does not trigger window.unload event in Firefox and Safari which is used to hide the preloader.

More info here: http://bugs.jquery.com/ticket/8684

If you wish a page reload just bind an event to to window.unload

jQuery(window).unload(function(){});

in /js/scripts.js

It can be at line 6, after the window.load event handler

Thanks