manifest.json

{
    "app": {
        "background": {
            "scripts": ["background.js"]
        }
    },
    "manifest_version": 2,
    "name": "SalesPoint",
    "version": "1.4.0",
    
    "default_locale": "en",
    "description": "Point-of-Sale checkout kiosk app for Chrome",
    "icons": { 
        "16": "images/icon_16.png", 
        "48": "images/icon_48.png", 
        "128": "images/icon_128.png" 
    },
    
    "author": "ChromeKioskApps@gmail.com",
    "kiosk_enabled": true,
    "minimum_chrome_version": "37",
    "offline_enabled": true,
    "optional_permissions": [ 
        {
            "usbDevices": [
                {
                    "vendorId": 2338, 
                    "productId": 32772
                }
            ]
        }
    ], 
    "permissions": [
        "power",
        "accessibilityFeatures.read",
        "accessibilityFeatures.modify",
        "hid"
    ],   
    "sandbox": {
        "pages": [
            "scripts/sandbox-scripts.html"
        ]
    }
}