Invisible Character

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "__MSG_appName__",
    "description": "__MSG_shortDesc__",
    "default_locale": "en",
    "version": "1.0",
    "permissions": [
        "clipboardWrite",
        "sidePanel"
    ],
    "background": {
        "service_worker": "background.js"
    },
    "action": {
        "default_popup": "popup.html",
        "default_panel": "Click to open",
        "default_icon": {
            "16": "icon16.png",
            "48": "icon48.png",
            "64": "icon64.png",
            "128": "icon128.png"
        }
    },
    "side_panel": {
        "default_path": "popup.html"
    }
}