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I want to cancel my subscription how do I do it?

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I have been a Mozilla user for the last 3 - 4 years I now want to cancel my subscription. How do I do it?

I have been a Mozilla user for the last 3 - 4 years I now want to cancel my subscription. How do I do it?

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Thunderbird is free email client software running on your computer. There is no subscription. Just delete the program off your computer.