Page change monitor with a sound notification

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "Page change monitor with a sound notification",
    "version": "1.0.0",
    "permissions": [
        "",
        "storage"
    ],
    "externally_connectable": {
        "ids": [
            "*"
        ]
    },
    "description": "Monitors the site for the changes, it is useful for sound notification for MS Teams and others",
    "background": {
        "scripts": [
            "background.js"
        ]
    },
    "manifest_version": 2,
    "browser_action": {
        "name": "Sort",
        "default_icon": "icon16.png"
    },
    "icons": {
        "16": "icon16.png",
        "48": "icon48.png",
        "120": "icon120.png"
    },
    "options_ui": {
        "page": "options.html",
        "open_in_tab": false
    },
    "content_scripts": [
        {
            "js": [
                "content.js"
            ],
            "css": [
                "customStyles.css"
            ],
            "matches": [
                ""
            ]
        }
    ]
}