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Firefox version 40.0.3 used with Windows XP. Computer occasionally locks up when visiting a sub section of a website or when attemption to download a PDF file.

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I am using Firefox version 40.0.3 with Norton 360 and windows XP. Occasionally the computer will lock-up when accessing a sub-link of a website or when a PDF file is downloaded. The computer must then be powered down and rebooted to again start the computer.

I am using Firefox version 40.0.3 with Norton 360 and windows XP. Occasionally the computer will lock-up when accessing a sub-link of a website or when a PDF file is downloaded. The computer must then be powered down and rebooted to again start the computer.

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Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac Options)
key, and then starting Firefox. Is the problem still there?


As a test, disable the Norton toolbar.