Firefox running slow?

I recently reinstalled Firefox after a laptop crash/reboot. Now it runs really slowly. It takes ages to load pages. It crashes/freezes randomly, and if I'm not moving the mouse, it stops loading. So if I'm trying to watch a video on youtube, I can't watch it unless I'm moving the mouse... show more I recently reinstalled Firefox after a laptop crash/reboot.

Now it runs really slowly. It takes ages to load pages. It crashes/freezes randomly, and if I'm not moving the mouse, it stops loading. So if I'm trying to watch a video on youtube, I can't watch it unless I'm moving the mouse continuously! This is becoming such a pain. I can't even save images to my desktop, because it lags when it downloads anything.

How do I stop this!?

Thanks
4 answers 4