title: Why I can't enter on site where on other tab I start long script on tihs site?
body: <p>I open web-page on my site via browser, for example test.php, which contains long-time script (5min for example). When I open on other tab for example index.php of this site in the same browser there is failure (long loading) while long script on test.php finished on previous tab. I need to open other browser to enter on index.php.</p>
  
  <p>Why I can't open index.php on the same browser? It tied with session, and it block my next requests?</p>