Examine source code of Claude Usage Trackers

{
  "manifest_version": 2,
  "name": "Claude Usage Tracker",
  "version": "2.2.0",
  "description": "Real-time Claude AI usage tracking widget — see your plan limits, percentage used, reset timer, and get an alarm when usage resets.",
  "browser_specific_settings": {
    "gecko": {
      "id": "claude-usage-tracker@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "*://claude.ai/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://claude.ai/*"
      ],
      "js": [
        "inject.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "page": "background.html"
  },
  "web_accessible_resources": [
    "alarm.mp3"
  ],
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png"
  }
}