Examine source code of Broken Link Finder

{
  "manifest_version": 2,
  "name": "Broken Link Finder",
  "version": "1.0",
  "description": "Scan webpages to find broken, redirected, and valid links.",
  "permissions": [
    "activeTab",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Broken Link Finder"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "brokenlinkfinder@yourdomain.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}