On Windows, policy support is implemented using Group Policy. Firefox supports setting policies via Active Directory as well as using Local Group Policy.
The ADMX templates for Firefox are available for download here:
https://github.com/mozilla/policy-templates/releases
ADMX templates should be added to the X:\Windows\PolicyDefinitions
directory.
The latest information on our policies and more detail about specific policies is available at https://mozilla.github.io/policy-templates/ or on the about:policies#documentation
page in Firefox.