Examine source code of AO3 Fic Recommender

{
  "manifest_version": 2,
  "name": "AO3 Fic Recommender",
  "version": "1.0.0",
  "description": "AO3 fic recommendations from a user's public bookmarks. Pro key stored locally; usernames never leave your device.",
  "browser_action": {
    "default_title": "AO3 Fic Recommender",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "https://archiveofourown.org/*",
    "https://ao3reco.fly.dev/*",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ao3reco@busaragroup.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personallyIdentifyingInfo",
          "websiteContent"
        ]
      }
    }
  }
}