Examine source code of Claude Pulse

{
  "manifest_version": 3,
  "name": "Claude Pulse",
  "version": "1.3.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "claude-pulse@extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "description": "Token estimate, cache countdown, 5h/7d usage bars, and chat export on claude.ai. Computed locally.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png",
    "256": "icons/icon256.png"
  },
  "action": {
    "default_title": "Claude Pulse",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "96": "icons/icon96.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://claude.ai/*"
      ],
      "css": [
        "src/styles.css"
      ],
      "js": [
        "src/content/constants.js",
        "src/content/bridge-client.js",
        "src/vendor/o200k_base.js",
        "src/content/tokens.js",
        "src/content/ui.js",
        "src/content/scheduler.js",
        "src/content/main.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "src/injected/bridge.js"
      ],
      "matches": [
        "https://claude.ai/*"
      ]
    }
  ]
}