Countdown Timer

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "__MSG_extName__",
    "short_name": "__MSG_extShortName__",
    "description": "__MSG_extDescription__",
    "default_locale": "en",
    "background": {
        "service_worker": "\/js\/background.js"
    },
    "action": {
        "default_popup": "\/ui\/popup.html",
        "default_title": "__MSG_extTitle__",
        "default_icon": "\/icons\/icon-128.png"
    },
    "icons": {
        "16": "\/icons\/icon-16.png",
        "19": "\/icons\/icon-19.png",
        "32": "\/icons\/icon-32.png",
        "48": "\/icons\/icon-48.png",
        "64": "\/icons\/icon-64.png",
        "128": "\/icons\/icon-128.png"
    },
    "manifest_version": 3,
    "permissions": [
        "storage"
    ],
    "version": "3.0.1",
    "homepage_url": "http:\/\/countdown.pdfwork.com\/"
}