I have set up a website which is visible from FF but not from Safari nor Chrome. I thought it is because of faulty WordPress install but obviously it is not because I have added a test.html in the root, FF views it but Chrome gives an error.Never happened before, tried Google but found generally app or html problems causing the issue. 
Chrome fails to view a html file
html
seems you probably ran a cached instance of your site in FF while Chrome is actually telling you the you truly do not have a site being rendered. I checked your url in FF and I got the same as in Chrome (zip, nada, zilch, zero, nothing, absence of something, etc) :) check your site CNAME and DNS. You may not be directing the site to the domain properly.Right now you have these:  NS1.NATROHOST.COM  NS2.NATROHOST.COMAre these it?check your htaccess file. You may be blocking your entire site out