Broken Link Checker

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "version": "0.3.1",
  "name": "Broken Link Checker",
  "description": "A SEO tool to find broken (404) and redirected (301, 307, 308) links in all frames",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "notifications",
    "contextMenus"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "action": {},
  "background": {
    "service_worker": "worker.js"
  },
  "homepage_url": "https://webextension.org/listing/broken-link-checker.html",
  "web_accessible_resources": [
    {
      "resources": [
        "data/popup/index.html"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "commands": {
    "_execute_action": {
      "description": "Press the action button"
    }
  }
}