Hello irfan_pak10, sorry,i just saw the thread late.
Sadly, these are tiny script which are programmed to hijack third-party browser(s). it can be annoying when your borwser has been hijacked.
I'm glad you where able to resolve the issue through the help of some other member's on this forum.
Now, i strongly suggest that you should install
ads blocker plus to prevent such sad incident next time when browsing on unsafe site(s)
*This program will automatically block those
popup,pop-under app's
that will try to hijack yr browser without permission.
Thanks
Arlene