Examine source code of Website Time Tracker

{
  "manifest_version": 3,
  "name": "Website Time Tracker",
  "version": "1.0",
  "description": "Tracks website usage time and blocks sites after limits are exceeded",
  "browser_specific_settings": {
    "gecko": {
      "id": "{12345678-1234-1234-1234-123456789022}"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Website Time Tracker"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}