Examine source code of retire.js

{
  "manifest_version": 2,
  "name": "retire.js",
  "description": "Scanning website for vulnerable js libraries",
  "version": "2.3.2",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@retire.js",
      "strict_min_version": "79.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "121.0"
    }
  },
  "permissions": [
    "<all_urls>",
    "webRequest",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/icon48.png",
    "default_title": "retire.js",
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/content.js"
      ],
      "run_at": "document_start"
    }
  ]
}