Also for your Firefox, I agree with Pete C, disable and re-enable to see if one is causing it. The more extensions you have installed not only slows your FF performance and startup but introduces more potential problems. I love FF and have quite a few extension, but I have 50% of them disabled when I don't need them. My favorite extension that I want to mention is FEBE. Firefox backup extension that is reliable and can be scheduled to backup whatever part of Firefox you want. This can be important because it allows you to reinstall FF and only restore the parts you want and not a whole profile.
Firefox Critical Error
in Windows 10, 8, 7, Vista, and XP
Posted
We use Acronis also, great imaging/backup utility. I had is image machines that Ghost could not.
Acronis Home Page
Also for your Firefox, I agree with Pete C, disable and re-enable to see if one is causing it. The more extensions you have installed not only slows your FF performance and startup but introduces more potential problems. I love FF and have quite a few extension, but I have 50% of them disabled when I don't need them. My favorite extension that I want to mention is FEBE. Firefox backup extension that is reliable and can be scheduled to backup whatever part of Firefox you want. This can be important because it allows you to reinstall FF and only restore the parts you want and not a whole profile.
Good luck.