Floating Countdown Timer

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "Floating Countdown Timer",
    "version": "2.0.1",
    "description": "Displays a floating countdown timer (with ms) on any page for event registrations.",
    "icons": {
        "16": "icon.png",
        "48": "icon.png",
        "128": "icon.png"
    },
    "action": {
        "default_icon": {
            "16": "icon.png",
            "24": "icon.png",
            "32": "icon.png"
        },
        "default_title": "Toggle Countdown Timer"
    },
    "options_page": "options.html",
    "permissions": [
        "storage",
        "alarms",
        "notifications",
        "scripting"
    ],
    "host_permissions": [
        "<all_urls>"
    ],
    "content_scripts": [
        {
            "matches": [
                "<all_urls>"
            ],
            "js": [
                "content.js"
            ],
            "css": [
                "content.css"
            ],
            "run_at": "document_idle"
        }
    ],
    "background": {
        "service_worker": "background.js"
    }
}