Some Times you have to put large Image or any heavy content in your website and your visitor have to see withe page until full page loaded . This is boring and may be they leave your web site , this plugin could be solution .
Thank to Gaya Kessler for QueryLoader2
After disabling the plugin via phpmyadmin, the site returned.
Installed and working under 60 seconds.
1 remark though: If you don't scroll down on the Joomina site, you better understand Arabic :)
Thank you For Your Review.
It is Not Arabic ! It Is Persian :-)