Examine source code of AO3 Advanced Marker

{
  "manifest_version": 3,
  "name": "AO3 Advanced Marker",
  "version": "13.6",
  "description": "Mark fanfics as read, track reading history, sync bookmarks to AO3, track yearly reading stats, and rate fics with a 5-star system.",
  "key": "mfpefhlopjkdhgjmihliggklkkkppfan",
  "action": {
    "default_icon": "icon48.png",
    "default_title": "AO3 Advanced Marker Settings"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "identity",
    "storage",
    "unlimitedStorage",
    "activeTab"
  ],
  "host_permissions": [
    "*://*.archiveofourown.org/*",
    "https://api.jsonbin.io/*",
    "https://oauth2.googleapis.com/*",
    "https://www.googleapis.com/*",
    "https://accounts.google.com/*"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.archiveofourown.org/tags/*",
        "*://*.archiveofourown.org/users/*",
        "*://*.archiveofourown.org/series/*",
        "*://*.archiveofourown.org/bookmarks*",
        "*://*.archiveofourown.org/works*",
        "*://*.archiveofourown.org/collections/*"
      ],
      "js": [
        "utils.js",
        "storage.js",
        "auth.js",
        "drive_sync.js",
        "ao3_api.js",
        "ui.js",
        "stats.js",
        "rating-ui.js",
        "highlights.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ao3-advanced-marker-2@leehsuus.com",
      "strict_min_version": "109.0"
    }
  }
}