policies.json

{
  "policies": {
    "DisablePrivateBrowsing": true,
    "DisableFirefoxAccounts": true,
    "DisableTelemetry": true,
    "DisableFirefoxStudies": true,
    "DisableFormHistory": true,
    "OfferToSaveLogins": false,
    "PasswordManagerEnabled": false,
    "PrimaryPassword": false,
    "AutofillCreditCardEnabled": false,
    "AutofillAddressEnabled": false,
    "DisableProfileImport": true,
    "DisableSystemAddonUpdate": true,
    "DisableAppUpdate": false,
    "BlockAboutAddons": true,
    "BlockAboutConfig": false,
    "BlockAboutProfiles": true,
    "BlockAboutSupport": true,

    "Homepage": { "URL": "about:blank", "Locked": true },
    "SearchBar": "hidden",

    "DisableSecurityBypass": {
      "SafeBrowsing": true,
      "DownloadBlocking": true,
      "ExtensionInstall": true
    },

    "SSLVersionMin": "tls1.2",
    "Cookies": { "Default": "block_third_party" },
    "EnableTrackingProtection": { "Value": "always" },

    "HttpsOnlyMode": { "Value": true, "Locked": true },

    "Permissions": {
      "Camera": { "BlockNewRequests": true, "Locked": true },
      "Microphone": { "BlockNewRequests": true, "Locked": true },
      "Location": { "BlockNewRequests": true, "Locked": true },
      "Notifications": { "BlockNewRequests": true, "Locked": true },
      "VirtualReality": { "BlockNewRequests": true, "Locked": true },
      "ScreenShare": { "BlockNewRequests": true, "Locked": true },
      "Autoplay": { "Default": "block-audio-video", "Locked": true }
    },

    "ExtensionSettings": {
      "*": { "installation_mode": "blocked" },
      "[email protected]": {
        "installation_mode": "force_installed",
        "install_url": "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi"
      }
    },

    "Preferences": {
      "dom.vr.enabled": false,
      "media.setsinkid.enabled": false,
      "media.peerconnection.enabled": false,
      "privacy.resistFingerprinting.block_mozAddonManager": true
    }
  }
}