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I am charged monthly/yearly for Mozilla Firefox. Who do I contact to change my account information?

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I need to update my account information on Mozilla Firefox. How do I do this. I can't find anywhere online or in Mozilla Firefox where I can do this. Please help me.

I need to update my account information on Mozilla Firefox. How do I do this. I can't find anywhere online or in Mozilla Firefox where I can do this. Please help me.

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