google calendar duplicate event

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "__MSG_appName__",
    "version": "4",
    "description": "__MSG_shortDesc__",
    "manifest_version": 3,
    "default_locale": "en",
    "icons": {
        "16": "images\/duplicate16.png",
        "48": "images\/duplicate48.png",
        "64": "images\/duplicate64.png",
        "128": "images\/duplicate128.png"
    },
    "action": {
        "default_popup": "index.html",
        "default_icon": {
            "16": "images\/duplicate16.png",
            "48": "images\/duplicate48.png",
            "64": "images\/duplicate64.png",
            "128": "images\/duplicate128.png"
        }
    },
    "background": {
        "service_worker": ".\/static\/js\/background.js"
    },
    "content_scripts": [
        {
            "matches": [
                "https:\/\/calendar.google.com\/calendar\/*"
            ],
            "js": [
                ".\/static\/js\/contentScript.js"
            ],
            "run_at": "document_end"
        }
    ],
    "permissions": [
        "storage",
        "webNavigation",
        "activeTab",
        "scripting",
        "tabs"
    ],
    "web_accessible_resources": [
        {
            "resources": [
                "static\/js\/contentScript.js",
                "images\/duplicate16.png",
                "images\/duplicate48.png",
                "images\/duplicate64.png",
                "images\/duplicate128.png",
                "images\/rating_star.png",
                "images\/click_duplicate.png",
                "images\/click_event.png",
                "images\/rocket.png"
            ],
            "matches": [
                "<all_urls>"
            ]
        }
    ]
}