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when I am downloading the latest version I get a message saying that it could possibly damage my computer?

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I have been trying to recently update the version of Firefox installed on my computer. I have a Toshiba Satellite l305 laptop with a windows vista 32bit operating system. The latest version of Firefox has caused my computer to crash and I have only been able to do a "system restore" to resolve and repair the resulting crash.

I have been trying to recently update the version of Firefox installed on my computer. I have a Toshiba Satellite l305 laptop with a windows vista 32bit operating system. The latest version of Firefox has caused my computer to crash and I have only been able to do a "system restore" to resolve and repair the resulting crash.

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If you download Firefox from the Mozilla server then it is OK and you can ignore that warning as it is caused by the file not being digitally signed.