Examine source code of Claude Usage Tracker

{
  "manifest_version": 3,
  "name": "Claude Usage Widget",
  "version": "0.1.0",
  "description": "See your Claude.ai session and weekly usage limits, when they reset, and get notified on reset.",
  "permissions": [
    "storage",
    "alarms",
    "notifications"
  ],
  "host_permissions": [
    "https://claude.ai/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "claude-usage-widget@bombadilloo.dev",
      "strict_min_version": "109.0"
    }
  }
}