Messenger CRM for FB

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "Messenger CRM for FB",
    "version": "1.0",
    "description": "Tag & Manage users in Facebook Messenger",
    "icons": {
        "16": "icon.png",
        "48": "icon.png",
        "128": "icon.png"
    },
    "permissions": [
        "activeTab",
        "storage"
    ],
    "host_permissions": [
        "https:\/\/app.clickweber.com\/*"
    ],
    "action": {
        "default_popup": "popup.html",
        "default_icon": {
            "16": "icon.png",
            "48": "icon.png",
            "128": "icon.png"
        }
    },
    "content_scripts": [
        {
            "matches": [
                "https:\/\/www.facebook.com\/messages\/*"
            ],
            "js": [
                "content.js"
            ],
            "run_at": "document_end"
        }
    ],
    "background": {
        "service_worker": "background.js"
    }
}