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ARM64 version not available on Microsoft Store

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I have recently migrated my Firefox install from Mozilla's website to Microsoft Store, and I have noticed it installs the 32bit version on my Surface Pro X. But through Mozilla, I can get the ARM64 version.

Will the Microsoft Store install offer an ARM64 version, or will it be available only through Mozilla?

I have recently migrated my Firefox install from Mozilla's website to Microsoft Store, and I have noticed it installs the 32bit version on my Surface Pro X. But through Mozilla, I can get the ARM64 version. Will the Microsoft Store install offer an ARM64 version, or will it be available only through Mozilla?
Attached screenshots

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I don't know why the screenshots appear dark, but I uploaded them to Imgur. https://imgur.com/a/kFoGwed