Layout Grid for browser

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "short_name": "layout Grid",
  "name": "Layout Grid for browser",
  "description": "You can set Layout Grid like design tools.",
  "version": "1.0.2",
  "manifest_version": 3,
  "action": {
    "default_title": "LayoutGrid"
  },
  "background": {
    "service_worker": "./static/js/serviceWorker.js"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "./static/js/content.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "layoutgrid_16x16.png",
    "48": "layoutgrid_48x48.png",
    "128": "onLayoutgrid_128x128.png"
  }
}