CSS Helper

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "CSS Helper",
    "version": "1.0",
    "description": "Inspect CSS properties of the current webpage",
    "action": {
        "default_title": "CSS Helper",
        "default_icon": {
            "16": "icon16.png",
            "48": "icon48.png",
            "128": "icon128.png"
        }
    },
    "permissions": [
        "sidePanel",
        "scripting",
        "activeTab",
        "tabs",
        "clipboardWrite"
    ],
    "host_permissions": [
        "<all_urls>"
    ],
    "side_panel": {
        "default_path": "sidepanel.html"
    },
    "background": {
        "service_worker": "background.js"
    },
    "content_scripts": [
        {
            "matches": [
                "<all_urls>"
            ],
            "js": [
                "content.js"
            ]
        }
    ]
}