UserAgent: Mozilla/5.0 (Windows NT 5.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36

Steps to reproduce the problem:
1. Open the site http://rewtygirl.ru/ads/
2. Try to close the tab without agreeing to anything it asks you

What is the expected behavior?
Chrome should allow you to close the site tab without agreeing to any prompt the site makes.

What went wrong?
The site shows you prompts and prohibit you from closing the tab while you don't agree to prompt it shows to you. It asks you to install an extension. But technically it can ask user to do anything and user will agree because it seems to be the only way to close the tab with annoying site.

Did this work before? N/A 

Chrome version: 49.0.2623.87  Channel: n/a
OS Version: 5.2 (Windows Server 2003, Windows XP 64)
Flash Version: Shockwave Flash 21.0 r0