Page Load and LCP Timer

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "Page Load and LCP Timer",
    "version": "1.0.1",
    "description": "Displays page load time and LCP in milliseconds",
    "permissions": [
        "activeTab",
        "storage"
    ],
    "action": {
        "default_popup": "popup.html",
        "default_icon": {
            "16": "images\/icon16.png",
            "48": "images\/icon48.png",
            "128": "images\/icon128.png"
        }
    },
    "background": {
        "service_worker": "background.js"
    },
    "content_scripts": [
        {
            "matches": [
                "<all_urls>"
            ],
            "js": [
                "content.js"
            ]
        }
    ],
    "icons": {
        "16": "images\/icon16.png",
        "48": "images\/icon48.png",
        "128": "images\/icon128.png"
    }
}