IP Camera Viewer opens not closing connections

We recently discovered that our cameras were not losing connections when the pages to the IP Camera Viewers were closed, rather they were multiplying. I checked to see if we were properly closing pages and found we were. I attempted to load the URL when the page opens hoping that if I took away the address the connection would be forced to break. I read the forum, I looked through the manual. Could someone please tell me why the IP Camera Viewer is not giving up its connections to the camera and possibily if you know how to make it do so. I would be very thankful.