What causes Firefox to close down my computer and restarts it?It had done this several times today.

When I am on the computer or even when I am not.The computer will shut down and restart.I installed Firefox 2 days ago.

The one thing that is locking up fire fox is the plug ins. You have to check to see if a plug in is locking up firefox first of all.
To see the processes press : CTRL+ALT+DEL. then click the tab marked "Processes" Then look for Fire Fox and click on it. Click the Yes button when the warning box show up.
Then do the say for "Plug-in Container" I believe that is called.
this is because all ads are now flash ads or video ads. They lock my computer up all the time.
When the CTRL+ALT+DEL are pressed. Keep this minimized and you can see if your computer is running at 100% memory near the clock. If the box is totally green, you are running a lot of programs on your system. Check the processes and find out what is not needed. Also watch your virtual memory. Rule of thumb is 1.5x total memory.
Then now it would be able to shut down the computer the right way.
Hope this helps you out.

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