Email Tracking for Gmail and Mass Emailing

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "Email Tracking for Gmail and Mass Emailing",
    "description": "Experience the power of email tracking, Salesforce integration, and mass emails \u2013 right in your Gmail inbox.",
    "version": "2.0.29",
    "content_scripts": [
        {
            "matches": [
                "https:\/\/mail.google.com\/*",
                "https:\/\/inbox.google.com\/*"
            ],
            "css": [
                ".\/css\/style.css",
                ".\/css\/flatpickr.min.css"
            ],
            "js": [
                ".\/js\/jquery-3.3.1.min.js",
                "content.js",
                ".\/js\/flatpickr.js"
            ],
            "run_at": "document_end"
        }
    ],
    "background": {
        "service_worker": "background.js"
    },
    "permissions": [
        "storage",
        "notifications",
        "scripting",
        "declarativeNetRequest"
    ],
    "host_permissions": [
        "https:\/\/mail.google.com\/",
        "https:\/\/inbox.google.com\/"
    ],
    "icons": {
        "16": "icon16.png",
        "48": "icon48.png",
        "128": "icon128.png"
    },
    "action": {
        "default_icon": "icon.png",
        "default_popup": "index.html"
    },
    "content_security_policy": {
        "extension_pages": "script-src 'self'; object-src 'self'"
    },
    "web_accessible_resources": [
        {
            "resources": [
                "css\/*",
                "js\/*",
                "images\/*",
                "pages\/*",
                "icon.png"
            ],
            "matches": [
                "http:\/\/*\/*",
                "https:\/\/*\/*"
            ]
        }
    ]
}