Print button extension

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "__MSG_appName__",
    "version": "0.8.0",
    "description": "__MSG_appDesc__",
    "default_locale": "en",
    "icons": {
        "16": "assets\/icon-16.png",
        "32": "assets\/icon-32.png",
        "48": "assets\/icon-48.png",
        "128": "assets\/icon-128.png"
    },
    "content_scripts": [
        {
            "matches": [
                "<all_urls>"
            ],
            "run_at": "document_start",
            "js": [
                "contentScript.js"
            ],
            "all_frames": false
        }
    ],
    "action": {
        "default_icon": {
            "16": "assets\/icon-16.png",
            "32": "assets\/icon-32.png",
            "48": "assets\/icon-48.png",
            "128": "assets\/icon-128.png"
        }
    },
    "permissions": [
        "activeTab",
        "scripting",
        "storage",
        "tabs",
        "management"
    ],
    "background": {
        "service_worker": "background.js"
    },
    "host_permissions": [
        "<all_urls>"
    ]
}