Examine source code of Claude Usage Tracker

{
  "manifest_version": 3,
  "name": "Claude Usage Tracker",
  "version": "5.4.5",
  "description": "Helps you track your claude.ai usage caps based on tokens sent.",
  "author": "lugia19",
  "browser_specific_settings": {
    "gecko": {
      "id": "claude_usage_tracker@lugia19.com",
      "strict_min_version": "128.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "https://claude.ai/*"
      ],
      "js": [
        "lib/browser-polyfill.min.js",
        "lib/o200k_base.js",
        "content-components/localization.js",
        "content-components/content_utils.js",
        "content-components/sse_bridge.js",
        "content-components/electron_reciever.js",
        "content-components/ui_dataclasses.js",
        "content-components/notification_card.js",
        "content-components/usage_ui.js",
        "content-components/length_ui.js"
      ]
    },
    {
      "matches": [
        "https://claude.ai/*"
      ],
      "js": [
        "injections/usage-sse-watcher.js"
      ],
      "world": "MAIN",
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage",
    "alarms",
    "webRequest",
    "webRequestBlocking",
    "cookies",
    "contextualIdentities",
    "tabs",
    "contextMenus",
    "notifications"
  ],
  "host_permissions": [
    "*://claude.ai/*",
    "https://raw.githubusercontent.com/*",
    "https://github.com/*",
    "https://api.anthropic.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "default-config.json",
        "lib/browser-polyfill.min.js",
        "lib/o200k_base.js",
        "kofi-button.png",
        "debug.html",
        "update_patchnotes.txt",
        "tracker-styles.css",
        "injections/webrequest-polyfill.js",
        "qol-badge.png",
        "rate-badge.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "128": "icon128.png",
    "512": "icon512.png"
  },
  "action": {
    "default_icon": "icon128.png",
    "default_title": "Claude Usage Tracker",
    "default_popup": "popup.html"
  },
  "incognito": "not_allowed"
}