View Google Docs Gridlines

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "View Google Docs Gridlines",
    "short_name": "Google Docs Gridlines",
    "version": "0.3",
    "description": "View invisible table outlines as gridlines",
    "manifest_version": 3,
    "background": {
        "service_worker": "background.js"
    },
    "content_scripts": [
        {
            "matches": [
                "https:\/\/docs.google.com\/document\/*"
            ],
            "js": [
                "content.js"
            ],
            "css": [
                "override.css"
            ],
            "run_at": "document_end"
        },
        {
            "matches": [
                "https:\/\/docs.google.com\/document\/*"
            ],
            "js": [
                "preload.js"
            ],
            "world": "MAIN",
            "run_at": "document_start"
        }
    ],
    "icons": {
        "128": "icon\/chrome-web-store-icon.png"
    },
    "action": {
        "default_icon": {
            "16": "icon\/icon-activated-16.png",
            "24": "icon\/icon-activated-24.png",
            "32": "icon\/icon-activated-32.png"
        },
        "default_title": "View Google Docs Gridlines",
        "default_popup": "popup.html"
    },
    "permissions": [
        "tabs",
        "storage"
    ]
}