Examine source code of Klokd – Website Time Tracker & Site Blocker

{
  "manifest_version": 3,
  "name": "Klokd – Website Time Tracker & Site Blocker",
  "version": "3.3.2",
  "description": "Track and manage your browsing time locally with 100% privacy - No data leaves your device.",
  "browser_specific_settings": {
    "gecko": {
      "id": "klokd@timetracker.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "activeTab",
    "alarms",
    "idle",
    "webNavigation",
    "notifications"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "background": {
    "service_worker": "service-worker.js",
    "scripts": [
      "blocking-data.js",
      "categories-data.js",
      "storage.js",
      "js/background/utils.js",
      "js/background/focus-mode.js",
      "js/background/daily-limits.js",
      "js/background/time-boxed.js",
      "js/background/session-tracker.js",
      "js/background/heartbeat.js",
      "js/background/tab-manager.js",
      "js/background/message-handler.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "blocking-data.js",
        "distraction-filter-rules.js",
        "storage.js",
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "assets/logo.png",
      "48": "assets/logo.png",
      "128": "assets/logo.png"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "options_page": "dashboard.html",
  "web_accessible_resources": [
    {
      "resources": [
        "assets/logo.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "16": "assets/logo.png",
    "48": "assets/logo.png",
    "128": "assets/logo.png"
  }
}