When I open Twitter and a web site with videos, the connection in Firefox 6.0 gets lost or frozen some time later. It tries to loads the page(s) but not the images and saying "connecting with... " and it doesn't load any page(s).

But the weird thing is the connection is out forever, I mean if I go another website is still "connecting with..." and the only fix is reboot my notebook as the notebook slows down crazily and cooling fan operates continuously. Windows 7 crashed with blue screen twice. Former Firefox versions operated very well.