manifest.json

{
    "name": "Whatsapp Privacy Lock",
    "author": "codeRed",
    "description": "blur your message, profile picture, chat list at public place where someone watching your screen.",
    "version": "1.0",
    "manifest_version": 3,
    "action": {
        "default_popup": "popup/index.html",
        "default_icon": "popup/image/whatsappPrivacy.png"
    },
    "background": {
        "service_worker": "bgRunning.js"
    },
    "icons": {
        "16": "popup/image/whatsappPrivacy16.png",
        "32": "popup/image/whatsappPrivacy32.png",
        "48": "popup/image/whatsappPrivacy48.png",
        "128": "popup/image/whatsappPrivacy128.png"
    },
    "permissions": ["activeTab","scripting","storage"],
    "content_scripts": [
        {
            "matches": ["https://web.whatsapp.com/"],
            "js": ["privacy.js"]
        }
    ]
}