Adam,

 

I've tried the given links, outcome is

 

 1.  if i simply open the first link it works in all browsers. since it is the normal code.

 2.  i downloaded new dll and used same  in my solution and simply run the code of the same link and it works.

 3. i copied the point 2 code in my pop-up solution with link to hide the pop-up, result  nothing new happened, uploader HANGED in firefox after clicking hide link and in other browser it is working perfectly fine even after hiding.

 

can look into the issue and provide us some solution for the same??

 

Thanks,

Aman