Dave wrote:
Try removing firefox then reinstalling it. That might fix that problem.
The other problem might be a virus or some kind of adware. You might also not have enough opsn space on a hard drive. Have you downloaded any large files, such as a big game or something of the sort lately. Make sure you hard drive has atleast a gig free and your memory is running well.
I'm agreed with dave. But you can also make your computer faster with no destop and no screensaver or just run spyware remover, maybe is there to much spyware on your computer. For the saftly you can run a virusscanner too.
I hope for you this works.