Examine source code of Netcraft Extension

{
  "name": "Netcraft Extension",
  "description": "Comprehensive site information and protection from phishing and malicious JavaScript when browsing the web",
  "version": "2.1.2",
  "action": {
    "default_title": "",
    "default_icon": {
      "16": "Images/action-normal-16.png",
      "24": "Images/action-normal-24.png",
      "32": "Images/action-normal-32.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "/JavaScript/worker/service_worker.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "/JavaScript/content/content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "webNavigation",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "icons": {
    "16": "Images/icon-small.png",
    "48": "Images/icon-mid.png",
    "128": "Images/icon-large.png"
  },
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e10f3d7-07f6-4f12-97b9-9b27e07139a5}"
    },
    "strict_min_version": "115"
  },
  "options_ui": {
    "page": "options.html"
  }
}