[FeatureReq - Partner Center] Improve documentation on "detailed guide to configuring extensions using the ExtensionSettings policy"

[middletonk]

Is your feature request related to a problem? Please describe.
I'd like to know how to replicate the "allow extension in InPrivate" checkbox using JSON as incompletely described in the detailed guide to configuring extensions using the ExtensionSettings policy.

Describe the solution you'd like
I'd like the documentation on the product to be complete, please and thanks.

Describe alternatives you've considered
I've considered giving up.

Additional context
I already submitted this as direct article feedback from the documentation page itself and and was instructed to come here.