fune/browser/components/enterprisepolicies/helpers/sample.json

{
  "policies": {
    "BlockAboutProfiles": true,
    "DontCheckDefaultBrowser": true,

    "FlashPlugin": {
      "Allow": ["https://www.example.com"],

      "Block": ["https://www.example.org"]
    },

    "CreateMasterPassword": false
  }
}