Since downloading the New Firefox 40.0 WebBroswer, it is extremely slow and unresponsive. Cannot keep up with simple typing in emails, can't close or open windows without a delay. As I write this message, type has a hard time keeping up. Only isnce loading the latest version has Firefox become buggy. I go to Safari and it zooms along. Also Firefox refuses to play videos on certain websites, yet Safari plays them with no problems. It is like it has to think about then think about it again, before it opens anything.

Very Slow, am about to change to back Safari