Basic Chrome Extension Test Example two extension

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "Basic Chrome Extension Test Example two extension",
    "version": "2.4.1",
    "manifest_version": 3,
    "description": "Stop auto discarding chrome tab for Twilio Flex",
    "background": {
        "service_worker": "background.js"
    },
    "content_scripts": [
        {
            "css": [
                "main.css"
            ],
            "js": [
                "contentScript.js"
            ],
            "matches": [
                "*:\/\/flex.twilio.com\/*",
                "*:\/\/observe.ai\/*"
            ]
        }
    ],
    "permissions": [
        "tabs",
        "storage",
        "declarativeNetRequest"
    ],
    "host_permissions": [
        "<all_urls>"
    ],
    "icons": {
        "16": "\/images\/Block-icon-16.png",
        "48": "\/images\/Block-icon-48.png",
        "128": "\/images\/Block-icon-128.png"
    }
}