[SOLVED] Anyone know how to import preferences into Firefox on multiple computers ?

D

Deleted member 2783327

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I am upgrading our PCs from 78esr to 91esr.
I have a set of about 70 preferences I need to import
I don't want to visit 250 PCs one at a time and make the changes one at a time via about:config
I can't just use a single default prefs.js because any or all of the PCs can have preferences specific to that user/PC
I've asked on Mozilla forums but got no answers.

Any one know how to import a set of preferences, automatically?