Examine source code of LinkBridge

{
  "manifest_version": 3,
  "name": "LinkBridge",
  "version": "1.5.0",
  "description": "Smarter access to your web",
  "permissions": [
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "action": {
    "default_title": "Open LinkBridge",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "linkbridge@juanjonavarro.com"
    }
  },
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  }
}