Countdown Timer for Email

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "Countdown Timer for Email",
    "version": "1.2.1",
    "description": "Add a countdown timer to your email, and get the maximum sales conversion.",
    "permissions": [
        "storage",
        "declarativeContent",
        "activeTab"
    ],
    "background": {
        "service_worker": "js\/service_worker.js"
    },
    "content_scripts": [
        {
            "matches": [
                "<all_urls>"
            ],
            "all_frames": true,
            "js": [
                "js\/initPage.js"
            ]
        }
    ],
    "externally_connectable": {
        "matches": [
            "http:\/\/promofeatures.local\/*",
            "https:\/\/promofeatures.com\/*"
        ],
        "ids": [
            "*"
        ]
    },
    "action": {
        "default_popup": "views\/timers.html",
        "default_icon": {
            "16": "images\/logo-16x16.png",
            "32": "images\/logo-32x32.png",
            "48": "images\/logo-48x48.png",
            "128": "images\/logo-128x128.png"
        }
    },
    "icons": {
        "16": "images\/logo-16x16.png",
        "32": "images\/logo-32x32.png",
        "48": "images\/logo-48x48.png",
        "128": "images\/logo-128x128.png"
    },
    "manifest_version": 3
}