Сumulative layout shift

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "default_locale": "en",
    "name": "__MSG_appName__",
    "description": "__MSG_shortDesc__",
    "version": "1",
    "permissions": [
        "storage",
        "scripting",
        "activeTab",
        "tabs"
    ],
    "host_permissions": [
        "<all_urls>"
    ],
    "background": {
        "service_worker": "background.js"
    },
    "action": {
        "default_popup": "popup.html"
    },
    "content_scripts": [
        {
            "matches": [
                "<all_urls>"
            ],
            "js": [
                "content.js"
            ],
            "run_at": "document_idle"
        }
    ],
    "icons": {
        "16": "images\/CLS_icon_16.png",
        "48": "images\/CLS_icon_48.png",
        "64": "images\/CLS_icon_64.png",
        "128": "images\/CLS_icon_128_01.png"
    }
}