Examine source code of AI Usages

{
  "manifest_version": 3,
  "name": "AI Usage Tracker",
  "version": "1.0",
  "description": "Tracks your active time and estimated token usage on ChatGPT, Claude, and Gemini, with rough environmental impact estimates.",
  "permissions": [
    "storage",
    "idle",
    "alarms"
  ],
  "host_permissions": [
    "https://chatgpt.com/*",
    "https://chat.openai.com/*",
    "https://claude.ai/*",
    "https://gemini.google.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://chatgpt.com/*",
        "https://chat.openai.com/*",
        "https://claude.ai/*",
        "https://gemini.google.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "AI Usage Tracker"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ai-usage-tracker@local.extension",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}