repo/testing/firefox/files/policies.json

{
	"policies": {
		"DisableAppUpdate": true,
		"DisableFirefoxStudies": true,
		"DisablePocket": true,
		"DisableTelemetry": true,
        "DisableFirefoxStudies": true,
        "DisableFeedbackCommands": true,
        "DisableFirefoxScreenshots": true,
        "DisableSystemAddonUpdate": true,
        "DontCheckDefaultBrowser": true,
        "ExtensionUpdate": false,
        "NetworkPrediction": false,
		"DontCheckDefaultBrowser": true,
        "CaptivePortal": false
	}
}