Why can't i use firefox on my mac

Microsoft protection say i need a code, but they want to send it to an email address that's obsolete. When I try to use my present one (which they have had in the past) i can't go any further.
I need to get into firefox so i can edit my webpage. I don't want to sinc it with my phone

Hi patriciastoj,
You can add these to the exclusion list in Microsoft's Protection, but I was not aware this could be installed on a Mac?
*C:/Program Files (x86)/Mozilla/Firefox for 64 bit systems
*C:/Program Files/Mozilla/Firefox for 32 bit systems

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Message was edited by: King_Penguin

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Attention!!!
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Why can't i use firefox on my mac

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