Examine source code of AO3 Kudos Checker

{
  "manifest_version": 3,
  "name": "AO3 Kudos Checker",
  "version": "1.0.9",
  "description": "Check whether you've left kudos on AO3 works — even while logged out.(Need to log in to view locked fics though)",
  "browser_specific_settings": {
    "gecko": {
      "id": "ao3-kudos-checker@ao3kudoschecker",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "https://archiveofourown.org/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://archiveofourown.org/*"
      ],
      "js": [
        "src/content.js"
      ],
      "css": [
        "src/content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "src/popup.html",
    "default_title": "AO3 Kudos Checker"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "service_worker": "src/background.js"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}