since i have upgraded to firefox4.0 i am getting lots of troubles to surf social networking sites. Firefox 4.0 is too heavy and slow and non responsive. Whenever i post a reply on a social networking site it takes ages to be posted By firefox4 or i must keep repeat clicking on the post tab to succeed to post my reply. I am tired and moving to IE. Apart from this firefox4.0 is not responding fast enough like it was with previous ones, 3.6 was much better, 4.0 is a flop!!!