Not only Firefox but Chrome and Avast Secure Browser shows multiple instances of being open in the Task Manager, Firefox says 5 are open and Chrome is 22 and Avast is 12. They show usage of my CPU and memory to the point that I can hardly move my mouse and any precision movement is impossible. Is it possible to make it stop doing this? If not what about it slowing my PC down. I have I7 8700, 32GBs Ram Win 10 is on an SSD and I use an Nvidia 1080TI. I should not have the slow down issue.