Starting with Firefox 56, Mozilla will silently and forcibly auto-upgrade some users of 32-bit Firefox to 64-bit versions. Obviously, the only ones that will be auto-migrated are users who run 32-bit versions of Firefox on computers with 64-bit architectures.

Desktop Central’s patching for Firefox will work based on Mozilla’s auto upgrade behaviour:

1. For computers with 32-bit architecture , you will be patched with the latest 32-bit versions of Firefox.
2. For computers with 64-bit architecture , you will be patched with the latest 64-bit versions of Firefox. Meaning, even if you have 32-bit version of Firefox installed, you will be patched only with the latest 64-bit versions. 

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