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I cannot start Microsoft Office Outlook window when trying to open e-mails

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I try to check my e-mails and a panel appears saying: "Cannot start Microsoft Office Outlook window."

== I tried to open my e-mails today and tonight

I try to check my e-mails and a panel appears saying: "Cannot start Microsoft Office Outlook window." == I tried to open my e-mails today and tonight

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How is that related to Firefox support?