Keepalive.aspx pop-up in FireFox

Been wanting to inform about this issue in FireFox browser. Every time the page loads this pop-up appears:

Is there some setting to be done in FF or is this a bug? I have to press Cancel everytime to dismiss this pop-up. I guess it has something to do with the Keepalive.aspx page which is loaded continuously in the background to keep the session alive.

However in Internet Explorer this issue is not there.

Dear Rohit,

You guessed it right. The page was there to keep the seesion alive. We have rectified the problem. Please check it at your end and let us know, if everything is fine.

Thanks

I see you changed keepalive.aspx to keepalive.html

Sure, I shall check it in FF at home (in office only IE )and post my findings.

Just checked with FF - problem solved. Thanks!!