Examine source code of Trace

{
  "manifest_version": 3,
  "default_locale": "en",
  "name": "Trace",
  "description": "Track fanfiction reading: import AO3/FFN metadata into Trace and sync progress.",
  "version": "0.4.0",
  "action": {
    "default_title": "Trace",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png",
      "48": "images/icon-48.png"
    }
  },
  "permissions": [
    "alarms",
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "https://archiveofourown.org/*",
    "https://*.archiveofourown.org/*",
    "https://archiveofourown.gay/*",
    "https://*.archiveofourown.gay/*",
    "https://archive.transformativeworks.org/*",
    "https://ao3.org/*",
    "https://*.ao3.org/*",
    "https://www.fanfiction.net/*",
    "https://m.fanfiction.net/*",
    "https://tracefiction.com/*",
    "https://www.tracefiction.com/*",
    "https://api.tracefiction.com/*"
  ],
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128.png",
    "256": "images/icon-256.png",
    "512": "images/icon-512.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://archiveofourown.org/*",
        "https://*.archiveofourown.org/*",
        "https://archiveofourown.gay/*",
        "https://*.archiveofourown.gay/*",
        "https://archive.transformativeworks.org/*",
        "https://ao3.org/*",
        "https://*.ao3.org/*",
        "https://www.fanfiction.net/*",
        "https://m.fanfiction.net/*"
      ],
      "js": [
        "collector.js",
        "library-overlay-keys.js",
        "library-overlay.js"
      ],
      "run_at": "document_end",
      "exclude_matches": [
        "https://archiveofourown.org/users/login*",
        "https://*.archiveofourown.org/users/login*",
        "https://archiveofourown.org/users/sign_up*",
        "https://*.archiveofourown.org/users/sign_up*",
        "https://archiveofourown.org/users/password*",
        "https://*.archiveofourown.org/users/password*",
        "https://archiveofourown.org/users/auth/*",
        "https://*.archiveofourown.org/users/auth/*",
        "https://archiveofourown.org/users/logout*",
        "https://*.archiveofourown.org/users/logout*",
        "https://archiveofourown.gay/users/login*",
        "https://*.archiveofourown.gay/users/login*",
        "https://archiveofourown.gay/users/sign_up*",
        "https://*.archiveofourown.gay/users/sign_up*",
        "https://archiveofourown.gay/users/password*",
        "https://*.archiveofourown.gay/users/password*",
        "https://archiveofourown.gay/users/auth/*",
        "https://*.archiveofourown.gay/users/auth/*",
        "https://archiveofourown.gay/users/logout*",
        "https://*.archiveofourown.gay/users/logout*",
        "https://archive.transformativeworks.org/users/login*",
        "https://archive.transformativeworks.org/users/sign_up*",
        "https://archive.transformativeworks.org/users/password*",
        "https://archive.transformativeworks.org/users/auth/*",
        "https://archive.transformativeworks.org/users/logout*",
        "https://ao3.org/users/login*",
        "https://*.ao3.org/users/login*",
        "https://ao3.org/users/sign_up*",
        "https://*.ao3.org/users/sign_up*",
        "https://ao3.org/users/password*",
        "https://*.ao3.org/users/password*",
        "https://ao3.org/users/auth/*",
        "https://*.ao3.org/users/auth/*",
        "https://ao3.org/users/logout*",
        "https://*.ao3.org/users/logout*",
        "https://www.fanfiction.net/login.php*",
        "https://www.fanfiction.net/signup.php*",
        "https://www.fanfiction.net/account/login*",
        "https://www.fanfiction.net/account/signup*",
        "https://www.fanfiction.net/auth/*",
        "https://m.fanfiction.net/login.php*",
        "https://m.fanfiction.net/signup.php*",
        "https://m.fanfiction.net/account/login*",
        "https://m.fanfiction.net/account/signup*",
        "https://m.fanfiction.net/auth/*"
      ]
    },
    {
      "matches": [
        "https://tracefiction.com/*",
        "https://www.tracefiction.com/*"
      ],
      "js": [
        "sync.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "trace@tracefiction.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent"
        ]
      }
    }
  }
}